Better support for nested/complex structured output schemas

[jhammarstedt]

One big drawback of ADK or the gemini API is that the structured output answers are very limited to simple pydantic models. I have a nested output model that works fine through openai's api but gemini complains it's too complex which implies that I have to make the output a json string instead (even when I simplifying quite a bit)

Is this being worked on addressing?

[boyangsvl]

Could you share what's specific with your pydantic model? E.g. how many layer does it have or whether it has special fields that the API doesn't understand?