docs: tool use documentation link (#873) (#616)

Co-authored-by: Vibeke Tengroth <[email protected]>
Co-authored-by: Packy Gallagher <[email protected]>

Author: 3 people

README.md

@@ -168,7 +168,7 @@ for await (const entry of results) {
 
 ## Tool use
 
-This SDK provides support for tool use, aka function calling. More details can be found in [the documentation](https://platform.claude.com/docs/en/api/tool-use).
+This SDK provides support for tool use, aka function calling. More details can be found in [the documentation](https://platform.claude.com/docs/en/agents-and-tools/tool-use/overview).
 The SDK provides helpers for making it easy to create and run tools. You can use Zod schemas or JSON Schemas to describe the input to a tool. You can then run those tools using the `client.messages.toolRunner()` method. This method will handle passing the inputs generated by the chosen model into the right tool and passing the result back to the model.
 
 ```ts