MCP Math Server

Instructions

Implementation Reference

• src/index.ts:21-28 (handler)

  The handler function for the 'add' tool that adds two input numbers 'a' and 'b' and returns a text message with the result.

  async ({ a, b }) => {
    const sum = a + b;
    return {
      content: [
        { type: "text", text: `The sum of ${a} and ${b} is ${sum}` }
      ]
    };
  }

• src/index.ts:16-20 (schema)

  The tool configuration including input schema (using Zod for numbers a and b), title, and description.

  {
    title: "Addition tool",
    description: "Add two numbers a + b",
    inputSchema: { a: z.number(), b: z.number() },
  },

• src/index.ts:14-29 (registration)

  Registers the 'add' tool on the MCP server with name, configuration (schema), and handler function.

  server.registerTool(
    "add",
    {
      title: "Addition tool",
      description: "Add two numbers a + b",
      inputSchema: { a: z.number(), b: z.number() },
    },
    async ({ a, b }) => {
      const sum = a + b;
      return {
        content: [
          { type: "text", text: `The sum of ${a} and ${b} is ${sum}` }
        ]
      };
    }
  );