Tools and MCPs

Define tools, handle tool calls and connect MCP servers from code.

1. 8.1Defining ToolsThe anatomy of a tool definition, how to write descriptions Claude will act on, what tool_choice controls, and the SDK helpers that generate schemas from code.9 min
2. 8.2Handling Tool Calls and ResultsThe exact wire format of the tool_use and tool_result cycle, parallel calls, error reporting, and the edge cases that break tool loops in production.9 min
3. 8.3Using MCP Servers from CodeWhat the Model Context Protocol standardises, and the three ways a developer connects Claude to an MCP server: the API's MCP connector, a local MCP client in your own loop, and the Agent SDK.9 min