fix: fix tool count in diagnostic test and rename n8n_create_data_table to n8n_create_datatable

- Update diagnostic test to expect 14 management tools and 21 total (was 13/20)
- Rename MCP tool from n8n_create_data_table to n8n_create_datatable to match
  n8n's own node naming convention (n8n-nodes-base.datatable)

Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en

https://claude.ai/code/session_01N9LRZy1t5jVisF1p7RXeR7

CHANGELOG.md

@@ -11,7 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
-- **`n8n_create_data_table` MCP tool** (Issue #640): Create data tables in n8n via the REST API
+- **`n8n_create_datatable` MCP tool** (Issue #640): Create data tables in n8n via the REST API
   - `N8nApiClient.createDataTable()` calling `POST /data-tables`
   - Zod-validated handler with `N8nApiError` handling for structured error responses
   - TypeScript interfaces matching the n8n OpenAPI spec (`DataTableColumn`, `DataTableColumnResponse`, `DataTable`)
@@ -23,7 +23,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
-- **Health check management tool count**: Updated from 13 to 14 to include `n8n_create_data_table`
+- **Health check management tool count**: Updated from 13 to 14 to include `n8n_create_datatable`
 
 Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en
 

src/mcp/handlers-n8n-manager.ts

@@ -1975,7 +1975,7 @@ export async function handleDiagnostic(request: any, context?: InstanceContext):
 
   // Check which tools are available
   const documentationTools = 7; // Base documentation tools (after v2.26.0 consolidation)
-  const managementTools = apiConfigured ? 14 : 0; // Management tools requiring API (includes n8n_create_data_table)
+  const managementTools = apiConfigured ? 14 : 0; // Management tools requiring API (includes n8n_create_datatable)
   const totalTools = documentationTools + managementTools;
 
   // Check npm version

src/mcp/server.ts

@@ -1496,7 +1496,7 @@ export class N8NDocumentationMCPServer {
         if (!this.repository) throw new Error('Repository not initialized');
         return n8nHandlers.handleDeployTemplate(args, this.templateService, this.repository, this.instanceContext);
 
-      case 'n8n_create_data_table':
+      case 'n8n_create_datatable':
         this.validateToolParams(name, args, ['name']);
         return n8nHandlers.handleCreateDataTable(args, this.instanceContext);
 

src/mcp/tool-docs/index.ts

@@ -62,7 +62,7 @@ export const toolsDocumentation: Record<string, ToolDocumentation> = {
   n8n_executions: n8nExecutionsDoc,
   n8n_workflow_versions: n8nWorkflowVersionsDoc,
   n8n_deploy_template: n8nDeployTemplateDoc,
-  n8n_create_data_table: n8nCreateDataTableDoc
+  n8n_create_datatable: n8nCreateDataTableDoc
 };
 
 // Re-export types

src/mcp/tool-docs/workflow_management/n8n-create-data-table.ts

@@ -1,12 +1,12 @@
 import { ToolDocumentation } from '../types';
 
 export const n8nCreateDataTableDoc: ToolDocumentation = {
-  name: 'n8n_create_data_table',
+  name: 'n8n_create_datatable',
   category: 'workflow_management',
   essentials: {
     description: 'Create a new data table in n8n. Requires n8n enterprise or cloud with the data tables feature enabled.',
     keyParameters: ['name', 'columns'],
-    example: 'n8n_create_data_table({name: "Contacts", columns: [{name: "email", type: "string"}]})',
+    example: 'n8n_create_datatable({name: "Contacts", columns: [{name: "email", type: "string"}]})',
     performance: 'Fast (100-300ms)',
     tips: [
       'Available column types: string, number, boolean, date, json',
@@ -27,9 +27,9 @@ export const n8nCreateDataTableDoc: ToolDocumentation = {
     },
     returns: 'Object with id and name of the created data table on success.',
     examples: [
-      'n8n_create_data_table({name: "Orders"}) - Create table without columns',
-      'n8n_create_data_table({name: "Contacts", columns: [{name: "email", type: "string"}, {name: "score", type: "number"}]}) - Create table with typed columns',
-      'n8n_create_data_table({name: "Events", columns: [{name: "payload", type: "json"}, {name: "occurred_at", type: "date"}]})'
+      'n8n_create_datatable({name: "Orders"}) - Create table without columns',
+      'n8n_create_datatable({name: "Contacts", columns: [{name: "email", type: "string"}, {name: "score", type: "number"}]}) - Create table with typed columns',
+      'n8n_create_datatable({name: "Events", columns: [{name: "payload", type: "json"}, {name: "occurred_at", type: "date"}]})'
     ],
     useCases: [
       'Persist structured workflow data across executions',

src/mcp/tools-n8n-manager.ts

@@ -608,7 +608,7 @@ export const n8nManagementTools: ToolDefinition[] = [
     },
   },
   {
-    name: 'n8n_create_data_table',
+    name: 'n8n_create_datatable',
     description: 'Create a new data table in n8n. Requires n8n enterprise or cloud with data tables feature.',
     inputSchema: {
       type: 'object',

tests/unit/mcp/handlers-n8n-manager.test.ts

@@ -1102,10 +1102,10 @@ describe('handlers-n8n-manager', () => {
             enabled: true,
           },
           managementTools: {
-            count: 13,
+            count: 14,
             enabled: true,
           },
-          totalAvailable: 20,
+          totalAvailable: 21,
         },
       });
 

tests/unit/mcp/parameter-validation.test.ts

@@ -542,8 +542,8 @@ describe('Parameter Validation', () => {
       await expect(server.testExecuteTool('n8n_test_workflow', {}))
         .rejects.toThrow('Missing required parameters for n8n_test_workflow: workflowId');
 
-      await expect(server.testExecuteTool('n8n_create_data_table', {}))
-        .rejects.toThrow('Missing required parameters for n8n_create_data_table: name');
+      await expect(server.testExecuteTool('n8n_create_datatable', {}))
+        .rejects.toThrow('Missing required parameters for n8n_create_datatable: name');
 
       for (const tool of n8nToolsWithRequiredParams) {
         await expect(server.testExecuteTool(tool.name, tool.args))