Invalid value: expected 'function' but received an incompatible input. Please check the input value.

The error you're encountering, specifically the "Invalid value: 'tool_call'. Value must be 'function'" with a 400 status code, is likely due to an incorrect configuration or misuse of the API parameters.

Here are the key reasons for this error:

1. Incorrect Role Specification: The OpenAI API requires that messages with the role 'tool' must be a response to a preceding message with 'tool_calls' or the correct role specification. Using 'tool_call' instead of 'function' violates this requirement[4").

2. API Documentation Mismatch: There might be discrepancies between the code you're using and the latest API documentation. For example, OpenAI's documentation may specify 'function' instead of 'tool' or 'tool_call', and using the wrong term can lead to this error.

3. Sequence of Messages: The error can also occur if the sequence of messages in your API requests is not maintained correctly, particularly when dealing with chat or conversation contexts.

These issues indicate a misalignment between your code and the expected API parameters or sequence.