n8n MCP Server

Instructions

Implementation Reference

• src/tools/variables.ts:170-199 (handler)

  The implementation of the 'n8n_delete_variable' tool. It registers the tool with the MCP server, defines its schema, and calls the 'del' service function to delete the variable.

    server.registerTool(
      'n8n_delete_variable',
      {
        title: 'Delete n8n Variable',
        description: `Delete a variable.
  
  ⚠️ WARNING: Workflows using this variable will break!
  
  Args:
    - id (string): Variable ID to delete
  
  Returns:
    Confirmation of deletion.`,
        inputSchema: IdParamSchema,
        annotations: {
          readOnlyHint: false,
          destructiveHint: true,
          idempotentHint: true,
          openWorldHint: false
        }
      },
      async (params: z.infer<typeof IdParamSchema>) => {
        await del(`/variables/${params.id}`);
        
        return {
          content: [{ type: 'text', text: `✅ Variable ${params.id} deleted successfully.` }],
          structuredContent: { deleted: true, id: params.id }
        };
      }
    );