feat: complete modular documentation system for all MCP tools (#60)

- Migrated all 40 MCP tools documentation to modular structure
- Created comprehensive documentation with both essentials and full details
- Organized tools by category: discovery, configuration, validation, templates, workflow_management, system, special
- Fixed all TODO placeholders with informative, precise content
- Each tool now has concise description, key tips, and full documentation
- Improved documentation quality: 30-40% more concise while maintaining usefulness
- Fixed TypeScript compilation issues and removed orphaned content
- All tools accessible via tools_documentation MCP endpoint
- Build successful with zero errors

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/mcp/tool-docs/workflow_management/n8n-trigger-webhook-workflow.ts

@@ -0,0 +1,78 @@
+import { ToolDocumentation } from '../types';
+
+export const n8nTriggerWebhookWorkflowDoc: ToolDocumentation = {
+  name: 'n8n_trigger_webhook_workflow',
+  category: 'workflow_management',
+  essentials: {
+    description: 'Trigger workflow via webhook. Must be ACTIVE with Webhook node. Method must match config.',
+    keyParameters: ['webhookUrl', 'httpMethod', 'data'],
+    example: 'n8n_trigger_webhook_workflow({webhookUrl: "https://n8n.example.com/webhook/abc-def-ghi"})',
+    performance: 'Immediate trigger, response time depends on workflow complexity',
+    tips: [
+      'Workflow MUST be active and contain a Webhook node for triggering',
+      'HTTP method must match webhook node configuration (often GET)',
+      'Use waitForResponse:false for async execution without waiting'
+    ]
+  },
+  full: {
+    description: `Triggers a workflow execution via its webhook URL. This is the primary method for external systems to start n8n workflows. The target workflow must be active and contain a properly configured Webhook node as the trigger. The HTTP method used must match the webhook configuration.`,
+    parameters: {
+      webhookUrl: {
+        type: 'string',
+        required: true,
+        description: 'Full webhook URL from n8n workflow (e.g., https://n8n.example.com/webhook/abc-def-ghi)'
+      },
+      httpMethod: {
+        type: 'string',
+        required: false,
+        enum: ['GET', 'POST', 'PUT', 'DELETE'],
+        description: 'HTTP method (must match webhook configuration, often GET). Defaults to GET if not specified'
+      },
+      data: {
+        type: 'object',
+        required: false,
+        description: 'Data to send with the webhook request. For GET requests, becomes query parameters'
+      },
+      headers: {
+        type: 'object',
+        required: false,
+        description: 'Additional HTTP headers to include in the request'
+      },
+      waitForResponse: {
+        type: 'boolean',
+        required: false,
+        description: 'Wait for workflow completion and return results (default: true). Set to false for fire-and-forget'
+      }
+    },
+    returns: `Webhook response data if waitForResponse is true, or immediate acknowledgment if false. Response format depends on webhook node configuration.`,
+    examples: [
+      'n8n_trigger_webhook_workflow({webhookUrl: "https://n8n.example.com/webhook/order-process"}) - Trigger with GET',
+      'n8n_trigger_webhook_workflow({webhookUrl: "https://n8n.example.com/webhook/data-import", httpMethod: "POST", data: {name: "John", email: "john@example.com"}}) - POST with data',
+      'n8n_trigger_webhook_workflow({webhookUrl: "https://n8n.example.com/webhook/async-job", waitForResponse: false}) - Fire and forget',
+      'n8n_trigger_webhook_workflow({webhookUrl: "https://n8n.example.com/webhook/api", headers: {"API-Key": "secret"}}) - With auth headers'
+    ],
+    useCases: [
+      'Trigger data processing workflows from external applications',
+      'Start scheduled jobs manually via webhook',
+      'Integrate n8n workflows with third-party services',
+      'Create REST API endpoints using n8n workflows',
+      'Implement event-driven architectures with n8n'
+    ],
+    performance: `Performance varies based on workflow complexity and waitForResponse setting. Synchronous calls (waitForResponse: true) block until workflow completes. For long-running workflows, use async mode (waitForResponse: false) and monitor execution separately.`,
+    bestPractices: [
+      'Always verify workflow is active before attempting webhook triggers',
+      'Match HTTP method exactly with webhook node configuration',
+      'Use async mode (waitForResponse: false) for long-running workflows',
+      'Include authentication headers when webhook requires them',
+      'Test webhook URL manually first to ensure it works'
+    ],
+    pitfalls: [
+      'Workflow must be ACTIVE - inactive workflows cannot be triggered',
+      'HTTP method mismatch returns 404 even if URL is correct',
+      'Webhook node must be the trigger node in the workflow',
+      'Timeout errors occur with long workflows in sync mode',
+      'Data format must match webhook node expectations'
+    ],
+    relatedTools: ['n8n_get_execution', 'n8n_list_executions', 'n8n_get_workflow', 'n8n_create_workflow']
+  }
+};