Gemini/Vertex AI removes json transformer `default`

[strawgate]

Initial Checks

• I confirm that I'm using the latest version of Pydantic AI
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Description

The Gemini and Vertex AI APIs support default but the Google schema transformer is currently removing default parameters

Example Code

Python, Pydantic AI & LLM client version

latest

[DouweM]

@strawgate Thanks for the report, we can fix that by dropping this line:

pydantic-ai/pydantic_ai_slim/pydantic_ai/profiles/google.py

Line 52 in 7728c2a

schema.pop('default', None)

Would you be up for a filing a PR to that effect?