Building custom tools for Claude Agent SDK agents — the @tool decorator, schema dicts, return shape, error returns, and the mcp__server__tool naming gotcha. Read when adding a new tool to a Claude Agent SDK project, when you need to expose Python functions to Claude, or when designing tool boundarie
Building custom tools for Claude Agent SDK agents — the @tool decorator, schema dicts, return shape, error returns, and the mcp__server__tool naming gotcha. Read when adding a new tool to a Claude Agent SDK project, when you need to expose Python functions to Claude, or when designing tool boundaries.
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