feat: implement AI-optimized MCP tools with 95% size reduction

- Add get_node_essentials tool for 10-20 essential properties only
- Add search_node_properties for targeted property search
- Add get_node_for_task with 14 pre-configured templates
- Add validate_node_config for comprehensive validation
- Add get_property_dependencies for visibility analysis
- Implement PropertyFilter service with curated essentials
- Implement ExampleGenerator with working examples
- Implement TaskTemplates for common workflows
- Implement ConfigValidator with security checks
- Implement PropertyDependencies for dependency analysis
- Enhance property descriptions to 100% coverage
- Add version information to essentials response
- Update documentation with new tools

Response sizes reduced from 100KB+ to <5KB for better AI agent usability.

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

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

scripts/test-node-info.js

@@ -0,0 +1,59 @@
+#!/usr/bin/env node
+/**
+ * Test get_node_info to diagnose timeout issues
+ */
+
+const { N8NDocumentationMCPServer } = require('../dist/mcp/server-update');
+
+async function testNodeInfo() {
+  console.log('🔍 Testing get_node_info...\n');
+  
+  try {
+    const server = new N8NDocumentationMCPServer();
+    await new Promise(resolve => setTimeout(resolve, 500));
+    
+    const nodes = [
+      'nodes-base.httpRequest',
+      'nodes-base.webhook',
+      'nodes-langchain.agent'
+    ];
+    
+    for (const nodeType of nodes) {
+      console.log(`Testing ${nodeType}...`);
+      const start = Date.now();
+      
+      try {
+        const result = await server.executeTool('get_node_info', { nodeType });
+        const elapsed = Date.now() - start;
+        const size = JSON.stringify(result).length;
+        
+        console.log(`✅ Success in ${elapsed}ms`);
+        console.log(`   Size: ${(size / 1024).toFixed(1)}KB`);
+        console.log(`   Properties: ${result.properties?.length || 0}`);
+        console.log(`   Operations: ${result.operations?.length || 0}`);
+        
+        // Check for issues
+        if (size > 50000) {
+          console.log(`   ⚠️  WARNING: Response over 50KB!`);
+        }
+        
+        // Check property quality
+        const propsWithoutDesc = result.properties?.filter(p => !p.description && !p.displayName).length || 0;
+        if (propsWithoutDesc > 0) {
+          console.log(`   ⚠️  ${propsWithoutDesc} properties without descriptions`);
+        }
+        
+      } catch (error) {
+        const elapsed = Date.now() - start;
+        console.log(`❌ Failed after ${elapsed}ms: ${error.message}`);
+      }
+      
+      console.log('');
+    }
+    
+  } catch (error) {
+    console.error('Fatal error:', error);
+  }
+}
+
+testNodeInfo().catch(console.error);