[MCP] Render full MCP errors to the model #5298
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nornagon-openai
approved these changes
Oct 17, 2025
tibo-openai
approved these changes
Oct 17, 2025
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Previously, the model couldn't see why MCP tool calls failed, many of which were the model using the parameters incorrectly. A common failure is the model stringifying the json for the notion-update-page tool which it then couldn't correct.
I want to do some system prompt massaging around this as well. However, it is crucial that the model sees the error so it can fix it.
Before:
After:
🎉
Fixes #4707