3fec6813f3
- Add intelligent protocol version negotiation (2024-11-05 for n8n, 2025-03-26 for standard clients) - Fix memory leak potential with async cleanup and connection close handling - Enhance error sanitization for production environments - Add schema validation for n8n nested output workaround - Improve Docker security with unpredictable UIDs/GIDs - Create n8n-friendly tool descriptions to reduce schema validation errors - Add comprehensive protocol negotiation test suite Addresses code review feedback: - Protocol version inconsistency resolved - Memory management improved - Error information leakage fixed - Docker security enhanced 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
629 lines
19 KiB
TypeScript
629 lines
19 KiB
TypeScript
import { ToolDefinition } from '../types';
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/**
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* n8n Documentation MCP Tools - FINAL OPTIMIZED VERSION
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*
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* Incorporates all lessons learned from real workflow building.
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* Designed to help AI agents avoid common pitfalls and build workflows efficiently.
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*/
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export const n8nDocumentationToolsFinal: ToolDefinition[] = [
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{
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name: 'tools_documentation',
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description: `Get documentation for n8n MCP tools. Call without parameters for quick start guide. Use topic parameter to get documentation for specific tools. Use depth='full' for comprehensive documentation.`,
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inputSchema: {
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type: 'object',
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properties: {
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topic: {
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type: 'string',
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description: 'Tool name (e.g., "search_nodes") or "overview" for general guide. Leave empty for quick reference.',
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},
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depth: {
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type: 'string',
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enum: ['essentials', 'full'],
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description: 'Level of detail. "essentials" (default) for quick reference, "full" for comprehensive docs.',
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default: 'essentials',
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},
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},
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},
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},
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{
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name: 'list_nodes',
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description: `List n8n nodes. Common: list_nodes({limit:200}) for all, list_nodes({category:'trigger'}) for triggers. Package: "n8n-nodes-base" or "@n8n/n8n-nodes-langchain". Categories: trigger/transform/output/input.`,
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inputSchema: {
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type: 'object',
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properties: {
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package: {
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type: 'string',
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description: '"n8n-nodes-base" (core) or "@n8n/n8n-nodes-langchain" (AI)',
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},
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category: {
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type: 'string',
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description: 'trigger|transform|output|input|AI',
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},
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developmentStyle: {
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type: 'string',
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enum: ['declarative', 'programmatic'],
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description: 'Usually "programmatic"',
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},
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isAITool: {
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type: 'boolean',
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description: 'Filter AI-capable nodes',
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},
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limit: {
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type: 'number',
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description: 'Max results (default 50, use 200+ for all)',
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default: 50,
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},
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},
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},
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},
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{
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name: 'get_node_info',
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description: `Get full node documentation. Pass nodeType as string with prefix. Example: nodeType="nodes-base.webhook"`,
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inputSchema: {
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type: 'object',
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properties: {
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nodeType: {
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type: 'string',
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description: 'Full type: "nodes-base.{name}" or "nodes-langchain.{name}". Examples: nodes-base.httpRequest, nodes-base.webhook, nodes-base.slack',
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},
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},
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required: ['nodeType'],
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},
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},
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{
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name: 'search_nodes',
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description: `Search n8n nodes by keyword. Pass query as string. Example: query="webhook" or query="database". Returns max 20 results.`,
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inputSchema: {
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type: 'object',
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properties: {
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query: {
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type: 'string',
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description: 'Search terms. Use quotes for exact phrase.',
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},
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limit: {
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type: 'number',
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description: 'Max results (default 20)',
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default: 20,
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},
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mode: {
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type: 'string',
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enum: ['OR', 'AND', 'FUZZY'],
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description: 'OR=any word, AND=all words, FUZZY=typo-tolerant',
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default: 'OR',
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},
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},
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required: ['query'],
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},
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},
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{
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name: 'list_ai_tools',
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description: `List 263 AI-optimized nodes. Note: ANY node can be AI tool! Connect any node to AI Agent's tool port. Community nodes need N8N_COMMUNITY_PACKAGES_ALLOW_TOOL_USAGE=true.`,
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inputSchema: {
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type: 'object',
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properties: {},
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},
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},
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{
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name: 'get_node_documentation',
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description: `Get readable docs with examples/auth/patterns. Better than raw schema! 87% coverage. Format: "nodes-base.slack"`,
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inputSchema: {
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type: 'object',
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properties: {
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nodeType: {
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type: 'string',
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description: 'Full type with prefix: "nodes-base.slack"',
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},
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},
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required: ['nodeType'],
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},
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},
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{
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name: 'get_database_statistics',
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description: `Node stats: 525 total, 263 AI tools, 104 triggers, 87% docs coverage. Verifies MCP working.`,
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inputSchema: {
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type: 'object',
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properties: {},
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},
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},
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{
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name: 'get_node_essentials',
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description: `Get node essential info. Pass nodeType as string with prefix. Example: nodeType="nodes-base.slack"`,
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inputSchema: {
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type: 'object',
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properties: {
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nodeType: {
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type: 'string',
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description: 'Full type: "nodes-base.httpRequest"',
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},
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},
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required: ['nodeType'],
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},
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},
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{
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name: 'search_node_properties',
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description: `Find specific properties in a node (auth, headers, body, etc). Returns paths and descriptions.`,
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inputSchema: {
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type: 'object',
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properties: {
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nodeType: {
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type: 'string',
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description: 'Full type with prefix',
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},
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query: {
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type: 'string',
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description: 'Property to find: "auth", "header", "body", "json"',
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},
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maxResults: {
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type: 'number',
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description: 'Max results (default 20)',
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default: 20,
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},
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},
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required: ['nodeType', 'query'],
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},
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},
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{
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name: 'get_node_for_task',
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description: `Get pre-configured node for tasks: post_json_request, receive_webhook, query_database, send_slack_message, etc. Use list_tasks for all.`,
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inputSchema: {
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type: 'object',
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properties: {
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task: {
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type: 'string',
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description: 'Task name. See list_tasks for options.',
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},
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},
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required: ['task'],
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},
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},
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{
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name: 'list_tasks',
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description: `List task templates by category: HTTP/API, Webhooks, Database, AI, Data Processing, Communication.`,
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inputSchema: {
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type: 'object',
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properties: {
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category: {
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type: 'string',
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description: 'Filter by category (optional)',
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},
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},
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},
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},
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{
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name: 'validate_node_operation',
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description: `Validate n8n node configuration. Pass nodeType as string and config as object. Example: nodeType="nodes-base.slack", config={resource:"channel",operation:"create"}`,
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inputSchema: {
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type: 'object',
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properties: {
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nodeType: {
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type: 'string',
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description: 'Node type as string. Example: "nodes-base.slack"',
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},
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config: {
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type: 'object',
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description: 'Configuration as object. For simple nodes use {}. For complex nodes include fields like {resource:"channel",operation:"create"}',
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},
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profile: {
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type: 'string',
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enum: ['strict', 'runtime', 'ai-friendly', 'minimal'],
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description: 'Profile string: "minimal", "runtime", "ai-friendly", or "strict". Default is "ai-friendly"',
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default: 'ai-friendly',
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},
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},
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required: ['nodeType', 'config'],
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additionalProperties: false,
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},
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outputSchema: {
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type: 'object',
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properties: {
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nodeType: { type: 'string' },
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workflowNodeType: { type: 'string' },
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displayName: { type: 'string' },
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valid: { type: 'boolean' },
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errors: {
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type: 'array',
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items: {
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type: 'object',
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properties: {
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type: { type: 'string' },
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property: { type: 'string' },
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message: { type: 'string' },
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fix: { type: 'string' }
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}
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}
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},
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warnings: {
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type: 'array',
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items: {
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type: 'object',
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properties: {
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type: { type: 'string' },
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property: { type: 'string' },
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message: { type: 'string' },
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suggestion: { type: 'string' }
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}
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}
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},
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suggestions: { type: 'array', items: { type: 'string' } },
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summary: {
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type: 'object',
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properties: {
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hasErrors: { type: 'boolean' },
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errorCount: { type: 'number' },
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warningCount: { type: 'number' },
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suggestionCount: { type: 'number' }
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}
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}
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},
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required: ['nodeType', 'displayName', 'valid', 'errors', 'warnings', 'suggestions', 'summary']
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},
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},
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{
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name: 'validate_node_minimal',
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description: `Check n8n node required fields. Pass nodeType as string and config as empty object {}. Example: nodeType="nodes-base.webhook", config={}`,
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inputSchema: {
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type: 'object',
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properties: {
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nodeType: {
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type: 'string',
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description: 'Node type as string. Example: "nodes-base.slack"',
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},
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config: {
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type: 'object',
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description: 'Configuration object. Always pass {} for empty config',
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},
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},
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required: ['nodeType', 'config'],
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additionalProperties: false,
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},
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outputSchema: {
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type: 'object',
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properties: {
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nodeType: { type: 'string' },
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displayName: { type: 'string' },
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valid: { type: 'boolean' },
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missingRequiredFields: {
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type: 'array',
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items: { type: 'string' }
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}
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},
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required: ['nodeType', 'displayName', 'valid', 'missingRequiredFields']
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},
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},
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{
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name: 'get_property_dependencies',
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description: `Shows property dependencies and visibility rules. Example: sendBody=true reveals body fields. Test visibility with optional config.`,
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inputSchema: {
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type: 'object',
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properties: {
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nodeType: {
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type: 'string',
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description: 'The node type to analyze (e.g., "nodes-base.httpRequest")',
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},
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config: {
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type: 'object',
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description: 'Optional partial configuration to check visibility impact',
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},
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},
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required: ['nodeType'],
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},
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},
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{
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name: 'get_node_as_tool_info',
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description: `How to use ANY node as AI tool. Shows requirements, use cases, examples. Works for all nodes, not just AI-marked ones.`,
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inputSchema: {
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type: 'object',
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properties: {
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nodeType: {
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type: 'string',
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description: 'Full node type WITH prefix: "nodes-base.slack", "nodes-base.googleSheets", etc.',
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},
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},
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required: ['nodeType'],
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},
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},
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{
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name: 'list_node_templates',
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description: `Find templates using specific nodes. 399 community workflows. Use FULL types: "n8n-nodes-base.httpRequest".`,
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inputSchema: {
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type: 'object',
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properties: {
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nodeTypes: {
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type: 'array',
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items: { type: 'string' },
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description: 'Array of node types to search for (e.g., ["n8n-nodes-base.httpRequest", "n8n-nodes-base.openAi"])',
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},
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limit: {
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type: 'number',
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description: 'Maximum number of templates to return. Default 10.',
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default: 10,
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},
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},
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required: ['nodeTypes'],
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},
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},
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{
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name: 'get_template',
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description: `Get complete workflow JSON by ID. Ready to import. IDs from list_node_templates or search_templates.`,
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inputSchema: {
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type: 'object',
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properties: {
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templateId: {
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type: 'number',
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description: 'The template ID to retrieve',
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},
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},
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required: ['templateId'],
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},
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},
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{
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name: 'search_templates',
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description: `Search templates by name/description keywords. NOT for node types! For nodes use list_node_templates. Example: "chatbot".`,
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inputSchema: {
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type: 'object',
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properties: {
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query: {
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type: 'string',
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description: 'Search keyword as string. Example: "chatbot"',
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},
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limit: {
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type: 'number',
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description: 'Maximum number of results. Default 20.',
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default: 20,
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},
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},
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required: ['query'],
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},
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},
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{
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name: 'get_templates_for_task',
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description: `Curated templates by task: ai_automation, data_sync, webhooks, email, slack, data_transform, files, scheduling, api, database.`,
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inputSchema: {
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type: 'object',
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properties: {
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task: {
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type: 'string',
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enum: [
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'ai_automation',
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'data_sync',
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'webhook_processing',
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'email_automation',
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'slack_integration',
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'data_transformation',
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'file_processing',
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'scheduling',
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'api_integration',
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'database_operations'
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],
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description: 'The type of task to get templates for',
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},
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},
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required: ['task'],
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},
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},
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{
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name: 'validate_workflow',
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description: `Full workflow validation: structure, connections, expressions, AI tools. Returns errors/warnings/fixes. Essential before deploy.`,
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inputSchema: {
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type: 'object',
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properties: {
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workflow: {
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type: 'object',
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description: 'The complete workflow JSON to validate. Must include nodes array and connections object.',
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},
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options: {
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type: 'object',
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properties: {
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validateNodes: {
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type: 'boolean',
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description: 'Validate individual node configurations. Default true.',
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default: true,
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},
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validateConnections: {
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type: 'boolean',
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description: 'Validate node connections and flow. Default true.',
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default: true,
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},
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validateExpressions: {
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type: 'boolean',
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description: 'Validate n8n expressions syntax and references. Default true.',
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default: true,
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},
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profile: {
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type: 'string',
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enum: ['minimal', 'runtime', 'ai-friendly', 'strict'],
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description: 'Validation profile for node validation. Default "runtime".',
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default: 'runtime',
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},
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},
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description: 'Optional validation settings',
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},
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},
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required: ['workflow'],
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additionalProperties: false,
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},
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outputSchema: {
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type: 'object',
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properties: {
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valid: { type: 'boolean' },
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summary: {
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type: 'object',
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properties: {
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totalNodes: { type: 'number' },
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enabledNodes: { type: 'number' },
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triggerNodes: { type: 'number' },
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validConnections: { type: 'number' },
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invalidConnections: { type: 'number' },
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expressionsValidated: { type: 'number' },
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errorCount: { type: 'number' },
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warningCount: { type: 'number' }
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}
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},
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errors: {
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type: 'array',
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items: {
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type: 'object',
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properties: {
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node: { type: 'string' },
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message: { type: 'string' },
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details: { type: 'string' }
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}
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}
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},
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warnings: {
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type: 'array',
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items: {
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type: 'object',
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properties: {
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node: { type: 'string' },
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message: { type: 'string' },
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details: { type: 'string' }
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}
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}
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},
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suggestions: { type: 'array', items: { type: 'string' } }
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},
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required: ['valid', 'summary']
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},
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},
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{
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name: 'validate_workflow_connections',
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description: `Check workflow connections only: valid nodes, no cycles, proper triggers, AI tool links. Fast structure validation.`,
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inputSchema: {
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type: 'object',
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properties: {
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workflow: {
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type: 'object',
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description: 'The workflow JSON with nodes array and connections object.',
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},
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},
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required: ['workflow'],
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additionalProperties: false,
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},
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outputSchema: {
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type: 'object',
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properties: {
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valid: { type: 'boolean' },
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statistics: {
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type: 'object',
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properties: {
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totalNodes: { type: 'number' },
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triggerNodes: { type: 'number' },
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validConnections: { type: 'number' },
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invalidConnections: { type: 'number' }
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}
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},
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errors: {
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type: 'array',
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items: {
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type: 'object',
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properties: {
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node: { type: 'string' },
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message: { type: 'string' }
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}
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}
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},
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warnings: {
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type: 'array',
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items: {
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type: 'object',
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properties: {
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node: { type: 'string' },
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message: { type: 'string' }
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}
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}
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}
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},
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required: ['valid', 'statistics']
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},
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},
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{
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name: 'validate_workflow_expressions',
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description: `Validate n8n expressions: syntax {{}}, variables ($json/$node), references. Returns errors with locations.`,
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inputSchema: {
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type: 'object',
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properties: {
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workflow: {
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type: 'object',
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description: 'The workflow JSON to check for expression errors.',
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},
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},
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required: ['workflow'],
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additionalProperties: false,
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},
|
|
outputSchema: {
|
|
type: 'object',
|
|
properties: {
|
|
valid: { type: 'boolean' },
|
|
statistics: {
|
|
type: 'object',
|
|
properties: {
|
|
totalNodes: { type: 'number' },
|
|
expressionsValidated: { type: 'number' }
|
|
}
|
|
},
|
|
errors: {
|
|
type: 'array',
|
|
items: {
|
|
type: 'object',
|
|
properties: {
|
|
node: { type: 'string' },
|
|
message: { type: 'string' }
|
|
}
|
|
}
|
|
},
|
|
warnings: {
|
|
type: 'array',
|
|
items: {
|
|
type: 'object',
|
|
properties: {
|
|
node: { type: 'string' },
|
|
message: { type: 'string' }
|
|
}
|
|
}
|
|
},
|
|
tips: { type: 'array', items: { type: 'string' } }
|
|
},
|
|
required: ['valid', 'statistics']
|
|
},
|
|
},
|
|
];
|
|
|
|
/**
|
|
* QUICK REFERENCE for AI Agents:
|
|
*
|
|
* 1. RECOMMENDED WORKFLOW:
|
|
* - Start: search_nodes → get_node_essentials → get_node_for_task → validate_node_operation
|
|
* - Discovery: list_nodes({category:"trigger"}) for browsing categories
|
|
* - Quick Config: get_node_essentials("nodes-base.httpRequest") - only essential properties
|
|
* - Full Details: get_node_info only when essentials aren't enough
|
|
* - Validation: Use validate_node_operation for complex nodes (Slack, Google Sheets, etc.)
|
|
*
|
|
* 2. COMMON NODE TYPES:
|
|
* Triggers: webhook, schedule, emailReadImap, slackTrigger
|
|
* Core: httpRequest, code, set, if, merge, splitInBatches
|
|
* Integrations: slack, gmail, googleSheets, postgres, mongodb
|
|
* AI: agent, openAi, chainLlm, documentLoader
|
|
*
|
|
* 3. SEARCH TIPS:
|
|
* - search_nodes returns ANY word match (OR logic)
|
|
* - Single words more precise, multiple words broader
|
|
* - If no results: use list_nodes with category filter
|
|
*
|
|
* 4. TEMPLATE SEARCHING:
|
|
* - search_templates("slack") searches template names/descriptions, NOT node types!
|
|
* - To find templates using Slack node: list_node_templates(["n8n-nodes-base.slack"])
|
|
* - For task-based templates: get_templates_for_task("slack_integration")
|
|
* - 399 templates available from the last year
|
|
*
|
|
* 5. KNOWN ISSUES:
|
|
* - Some nodes have duplicate properties with different conditions
|
|
* - Package names: use 'n8n-nodes-base' not '@n8n/n8n-nodes-base'
|
|
* - Check showWhen/hideWhen to identify the right property variant
|
|
*
|
|
* 6. PERFORMANCE:
|
|
* - get_node_essentials: Fast (<5KB)
|
|
* - get_node_info: Slow (100KB+) - use sparingly
|
|
* - search_nodes/list_nodes: Fast, cached
|
|
*/ |