Revenue Engine MCP

Instructions

Implementation Reference

• index.js:728-747 (handler)

  The handler for the 'read_file' tool. Validates the input path using isPathAllowed, checks if the file exists, reads the file content synchronously using fs.readFileSync, and returns a structured response with success status, path, content, and size.

  case "read_file": {
    const { path } = args;
    
    if (!isPathAllowed(path)) {
      throw new Error(`Access denied: Path not in allowed directories`);
    }
  
    if (!fs.existsSync(path)) {
      throw new Error(`File not found: ${path}`);
    }
  
    const content = fs.readFileSync(path, 'utf8');
    result = {
      success: true,
      path: path,
      content: content,
      size: content.length
    };
    break;
  }

• index.js:541-554 (schema)

  The input schema definition for the 'read_file' tool, specifying the required 'path' parameter as a string, listed in the tools response for ListToolsRequest.

  {
    name: "read_file",
    description: "Read contents of a file. Only works in allowed directories: revenue-engine-mcp, apps-script folders",
    inputSchema: {
      type: "object",
      properties: {
        path: { 
          type: "string", 
          description: "Full file path (e.g., C:\\Users\\Node1\\revenue-engine-mcp\\index.js)" 
        }
      },
      required: ["path"]
    }
  },

• index.js:58-63 (helper)

  Helper function used by read_file (and other FS tools) to check if the provided path is within allowed directories, preventing access to unauthorized files.

  function isPathAllowed(filePath) {
    const normalized = filePath.replace(/\//g, '\\');
    return ALLOWED_PATHS.some(allowedPath => 
      normalized.startsWith(allowedPath)
    );
  }