Anthropic Core Workflow: Tool Use
Implements Claude’s tool use and function calling capabilities within the Messages API to build autonomous AI agents.
This skill provides a comprehensive framework for implementing Claude's tool use (function calling) capability, allowing the model to interact with external systems and execute specific functions. It guides developers through defining tool schemas using JSON Schema, managing the message threading between tool_use and tool_result blocks, and constructing robust agentic loops that can handle multiple sequential actions. It is an essential foundation for building sophisticated AI assistants that require real-time data access, database interactions, or the ability to perform complex actions on behalf of the user.
Key Features
01Configurable tool choice options including auto, forced, and mandatory execution
02Implementation of tool_result message threading for multi-turn conversations
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04JSON Schema-based tool definition for precise input validation
05Advanced agentic loop patterns with configurable max-turn limits
06Handling of tool_use content blocks and structured response parsing
Use Cases
01Implementing multi-step workflows where Claude must sequentially call several functions to fulfill a user request
02Creating autonomous agents that can perform database searches and record updates based on natural language
03Building AI assistants that fetch real-time data from external weather, stock, or news APIs