import { z } from 'zod';
import { defineTool } from './types.js';
/**
* Input schema for echo tool.
*/
export const echoInputSchema = z.object({
message: z.string().min(1).describe('Message to echo back'),
uppercase: z.boolean().optional().describe('Convert message to uppercase'),
});
/**
* Echo tool - works in both Node and Workers.
* Simple test tool that echoes back input.
*/
export const echoTool = defineTool({
name: 'echo',
title: 'Echo',
description: 'Echo back a message, optionally transformed',
inputSchema: echoInputSchema,
outputSchema: {
echoed: z.string().describe('The echoed message'),
length: z.number().describe('Message length'),
},
annotations: {
title: 'Echo Message',
readOnlyHint: true,
destructiveHint: false,
idempotentHint: true,
openWorldHint: false,
},
handler: async (args) => {
const message = args.message;
const echoed = args.uppercase ? message.toUpperCase() : message;
const result = {
echoed,
length: echoed.length,
};
return {
content: [{ type: 'text', text: echoed }],
structuredContent: result,
};
},
});
