Define and compose tools

import { createServer, tool } from "@toolgrain/mcp";
import { z } from "zod";

const greet = tool({
  title: "Greeting",
  description: "Return a greeting for a person",
  annotations: { readOnlyHint: true, openWorldHint: false },
  input: z.object({ name: z.string() }),
  execute: ({ name }) => `Hello, ${name}!`,
});

const server = createServer({
  name: "hello", version: "1.0.0",
  tools: { "people.greet": greet },
});

const enthusiastic = tool({
  ...greet,
  description: "Return an enthusiastic greeting",
  execute: ({ name }) => `Hello, ${name}! Great to see you.`,
});