Unit 5 · Build an agent that can use tools

Delegate a job to a specialist agent

You expose a child agent as a typed specialist with its own tools, runtime, and context. Use one when the delegated job needs an independent agent loop.

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Worked example

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const coordinator = agent('task:string -> answer:string', { functions: [billingAgent, policyAgent] });

Run itIn your own project

npm install @ax-llm/ax

import { ai, ax } from '@ax-llm/ax';

const llm = ai({ name: 'openai', apiKey: process.env.OPENAI_APIKEY! });
const classify = ax('review:string -> sentiment:class "positive, negative, neutral"');

const result = await classify.forward(llm, {
  review: 'Useful and boring in the best way.',
});

Set OPENAI_APIKEY in your environment before running provider-backed code.

In the ax repo

From a clone of the ax repo:

npm run example -- typescript src/examples/typescript/short-agents/tools-agent.ts

Active practice

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Answer 2 in a row to learn this · attempt 1

Keep exploring

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Source-backed follow-up