build-a-tool-using-agent changedagents-and-tools/tool-use/build-a-tool-using-agent
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40204020Each SDK provides a helper that turns an ordinary function into a runnable tool and derives the input schema from its signature; the tabs below show the idiomatic form for each language.
40214021
4022<Note>
4023 Tool Runner is available in all seven SDKs: Python, TypeScript, C#, Go, Java, PHP, and Ruby. See [Tool Runner](https://platform.claude.com/docs/en/agents-and-tools/tool-use/tool-runner) for the full reference. The cURL and CLI tabs show a note instead of code; keep the Ring 4 loop for curl- or CLI-based scripts.
4024</Note>
4025
40264022<CodeGroup>
40274023 ```bash cURL
40284024 #!/bin/bash
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