feat(tools): rename start_here to tools_documentation with depth control (v2.7.4)

- Renamed start_here_workflow_guide to tools_documentation for clarity
- Added depth parameter to control documentation detail (essentials/full)
- Converted output from JSON to LLM-friendly plain text format
- Added per-tool documentation capability
- Created two-tier documentation system:
  - Essentials: brief info with key parameters and tips
  - Full: comprehensive docs with examples and best practices
- Documented 8 commonly used MCP tools
- Removed 380+ lines of unused getWorkflowGuide method
- Fixed duplicate tool definitions
- Updated all documentation references
- Added test script for tools documentation

BREAKING CHANGE: start_here_workflow_guide renamed to tools_documentation

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

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

src/mcp/tools.ts

@@ -8,15 +8,20 @@ import { ToolDefinition } from '../types';
  */
 export const n8nDocumentationToolsFinal: ToolDefinition[] = [
   {
-    name: 'start_here_workflow_guide',
-    description: `START HERE! Essential guide for using n8n MCP tools effectively. Returns workflow recommendations, common patterns, performance tips, and known issues. Call this FIRST before using other tools to avoid common mistakes and work efficiently.`,
+    name: 'tools_documentation',
+    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.`,
     inputSchema: {
       type: 'object',
       properties: {
         topic: {
           type: 'string',
-          enum: ['overview', 'workflow', 'search_tips', 'common_nodes', 'known_issues', 'performance', 'ai_tools', 'n8n_management'],
-          description: 'Optional: Get specific guidance on a topic. Default returns complete overview.',
+          description: 'Tool name (e.g., "search_nodes") or "overview" for general guide. Leave empty for quick reference.',
+        },
+        depth: {
+          type: 'string',
+          enum: ['essentials', 'full'],
+          description: 'Level of detail. "essentials" (default) for quick reference, "full" for comprehensive docs.',
+          default: 'essentials',
         },
       },
     },