What problem does it solve?
Claude needs to take actions, fetch data, or interact with external systems, but requires a structured mechanism to call external tools and manage tool responses.
Core Features & Use Cases
- Define tools with name, description, and input_schema so Claude can call them via tool_use blocks.
- Execute tool results in a deterministic, multi-turn loop to perform real-world tasks (API calls, file operations, data retrieval).
- Support agentic workflows by coordinating tool calls, handling tool_choice modes, and leveraging server tools for scalable operations.
- Use cases include real-time data gathering, automation of routine tasks, and integration with external services in AI agent pipelines.
Quick Start
Define your tools with a name, description, and input_schema, then start a Claude conversation that uses tool_use to call those tools.