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Implements comprehensive guidance for using n8n-mcp MCP tools effectively. This is the HIGHEST PRIORITY skill that addresses the 20% MCP tool failure rate. Files created: - 5 evaluations testing tool selection, nodeType formats, validation, and smart parameters - SKILL.md (505 lines) - Core tool usage guide with telemetry insights - SEARCH_GUIDE.md (243 lines) - Node discovery tools (search, essentials vs info) - VALIDATION_GUIDE.md (377 lines) - Configuration validation and auto-sanitization - WORKFLOW_GUIDE.md (385 lines) - Workflow management with 15 operation types - README.md - Skill metadata emphasizing highest priority Key features: - Tool selection guide with success rates (search_nodes 99.9%, get_node_essentials 91.7%) - nodeType format distinction (nodes-base.* vs n8n-nodes-base.*) - Validation profiles explained (minimal/runtime/ai-friendly/strict) - Smart parameters for IF/Switch nodes (branch="true", case=0) - Auto-sanitization system for operator structures - Telemetry insights (56s between edits, 18s search→essentials, 23s+58s validate→fix) - AI connection types (8 types documented) Total: ~1,650 lines across 10 files Based on analysis of 447,557 real MCP tool usage events. 🤖 Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en
n8n MCP Tools Expert
Expert guide for using n8n-mcp MCP tools effectively.
Purpose
Teaches how to use n8n-mcp MCP server tools correctly, fixing the 20% failure rate when using tools incorrectly.
Activates On
- search nodes
- find node
- validate
- MCP tools
- template
- workflow
- n8n-mcp
- tool selection
File Count
5 files, ~1,150 lines total
Priority
HIGHEST - Fixes 20% MCP tool failure rate
Dependencies
n8n-mcp tools: All of them! (40+ tools)
Related skills:
- n8n Expression Syntax (write expressions for workflows)
- n8n Workflow Patterns (use tools to build patterns)
- n8n Validation Expert (interpret validation results)
- n8n Node Configuration (configure nodes found with tools)
Coverage
Core Topics
- Tool selection guide (which tool for which task)
- nodeType format differences (nodes-base.* vs n8n-nodes-base.*)
- Validation profiles (minimal/runtime/ai-friendly/strict)
- Smart parameters (branch, case for multi-output nodes)
- Auto-sanitization system
- Workflow management (15 operation types)
- AI connection types (8 types)
Tool Categories
- Node Discovery (search, list, essentials, info)
- Configuration Validation (minimal, operation, workflow)
- Workflow Management (create, update, validate)
- Template Library (search, get)
- Documentation (tools, database stats)
Evaluations
5 scenarios (100% coverage expected):
- eval-001: Tool selection (search_nodes)
- eval-002: nodeType format (nodes-base.* prefix)
- eval-003: Validation workflow (profiles)
- eval-004: essentials vs info (5KB vs 100KB)
- eval-005: Smart parameters (branch, case)
Key Features
✅ Data-Driven: Based on 447,557 real MCP tool events ✅ Telemetry Insights: Actual usage patterns (56s between edits, 18s between search/essentials) ✅ Critical Mistakes: Highlights 20% failure rate issues ✅ Smart Parameters: Teaches semantic branch/case routing ✅ Auto-Sanitization: Explains automatic fixes ✅ Comprehensive: Covers all 40+ tools
Files
- SKILL.md (480 lines) - Core tool usage guide
- SEARCH_GUIDE.md (220 lines) - Node discovery tools
- VALIDATION_GUIDE.md (250 lines) - Validation tools and profiles
- WORKFLOW_GUIDE.md (200 lines) - Workflow management
- README.md (this file) - Skill metadata
Success Metrics
Expected outcomes:
- Correct nodeType formats (nodes-base.* for search)
- get_node_essentials preferred over get_node_info
- Validation profiles used correctly
- Smart parameters for IF/Switch nodes
- 20% failure rate reduced to <5%
Critical Insights
From MCP Testing Log:
- search → essentials: 9,835 occurrences, 18s avg
- validate → fix: 7,841 loops, 23s thinking, 58s fixing
- update_partial: 38,287 uses, 56s between edits
- get_node_info: 20% failure rate (use essentials!)
Last Updated
2025-10-20
Part of: n8n-skills repository Conceived by: Romuald Członkowski - www.aiadvisors.pl/en