https://github.com/Streen9/react-mcp

Instructions

Implementation Reference

• index.js:344-370 (handler)

  The main execution handler for the 'read-file' tool. Validates input, checks file existence, reads content with fs.readFileSync, and returns file details.

  async function handleReadFile(params) {
    try {
      const { filePath } = params;
  
      if (!filePath) {
        throw new Error("File path is required");
      }
  
      // Check if file exists
      if (!fs.existsSync(filePath)) {
        throw new Error(`File ${filePath} does not exist`);
      }
  
      // Read file content
      const content = fs.readFileSync(filePath, "utf8");
  
      return {
        filePath: filePath,
        content: content,
        size: Buffer.byteLength(content, "utf8"),
      };
    } catch (error) {
      return {
        error: `Error reading file: ${error.message}`,
      };
    }
  }

• index.js:457-459 (schema)

  Zod schema defining the input parameters for the 'read-file' tool: requires 'filePath' as string.

  const ReadFileSchema = z.object({
    filePath: z.string(),
  });

• index.js:582-595 (registration)

  Tool registration in the listTools handler, providing name, description, and input schema for 'read-file'.

  {
    name: "read-file",
    description: "Read the contents of a file",
    inputSchema: {
      type: "object",
      properties: {
        filePath: {
          type: "string",
          description: "Path to the file to read",
        },
      },
      required: ["filePath"],
    },
  },

• index.js:669-672 (registration)

  Dispatch case in the CallToolRequestSchema handler that parses arguments with ReadFileSchema and invokes the handleReadFile function.

  case "read-file":
    const readArgs = ReadFileSchema.parse(args);
    result = await handleReadFile(readArgs);
    break;