Fix bugs related to combining tools and output conformance #542
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Before, combining a tool call with output conformance could result in two different errors:
Vertex response generation failed: ClientError: [VertexAI.ClientError]: Within a single message, FunctionResponse cannot be mixed with other type of part in the request for sending chat message.
The first was caused by the output conformance middleware appending instructions to the last message instead of the last user role message.
The second was caused by the output schema validation trying to validate all candidates, even if the message returned contained no text or data part (e.g. a tool request).
Checklist (if applicable):