Tool Use (Anthropic)

Anthropic

Anthropic's authoritative guide to tool use ensures developers have accurate, up-to-date patterns for building capable agents with Claude.

September 13, 2026

Developers building Claude-powered agents

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About

Anthropic's official documentation for integrating tool use into Claude applications. Covers how to define tools, invoke them with proper parameters, and handle responses within agentic workflows. Includes practical examples and best practices for building Claude-based agents that can interact with external APIs and functions.

Who is it for

Software engineers and AI developers building production agents with Claude. Ideal for teams implementing tool use as a core capability in their LLM applications.

Anthropic's Official Tool Use Reference

This is the canonical source from Anthropic on tool use patterns with Claude, ensuring accuracy and alignment with current API capabilities. It provides real implementation guidance backed by the model's creators.

What you learn

How to define and structure tools for Claude to invoke

Proper request/response flow for tool use with Claude's API

Handling multi-step agentic workflows with tool chaining

Error handling and best practices for production tool integrations

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