Description

I switched from a custom file search tool to the native file_search: openai.tools.fileSearch one as part of my migration to SDK v5.

When it runs I get an assistant response in the UI, and then immediately see the tool called again, with a slightly different response coming back (ie its not showing a duplicate of the same message).

Then in OpenAI logs I see multiple tool messages (up to my stopWhen limit) with all of the following ones (after the correct initial tool call) showing invalid input.

This only happened for the File Search tool, not the OpenAI web search tool. When I switched back to my custom file search tool, all worked as expected.

Is there anything in the AI SDK implementation of fileSearch that might be causing the additional messages?

First image shows an assistant message completing and then immediately a tool call being made without any further user input.

The second image shows opening i logs with one completed message and then four following all with errors.

AI SDK Version

No response

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