Unit 5 · Build an agent that can use tools

Give an agent many tools without overload

You group large tool catalogs and load their details only when relevant. The agent begins with a compact index instead of carrying every tool description.

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Worked example

See the idea in context

// Generated package discovery metadata follows the AxAgentFunctionGroup shape where supported.
let group = json!({
  "namespace": "kb",
  "title": "Knowledge Base",
  "selectionCriteria": "Use for policy or documentation lookup.",
  "functions": ["search"]
});

Run itIn your own project

cargo add axllm

use axllm::{ai, ax};
use serde_json::json;

let llm = ai("openai", json!({"apiKey": std::env::var("OPENAI_API_KEY")?}))?;
let classify = ax("review:string -> sentiment:class \"positive, negative, neutral\"")?;

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 -- rust src/examples/rust/short-agents/tools_agent.rs

Active practice

Show that you can use it

Answer 2 in a row to learn this · attempt 1

Keep exploring

See the idea in context

Show that you can use it

Source-backed follow-up