Worked on the pydantic/pydantic-ai repository to enhance type safety for Gemini integration by refactoring the function_declarations field. The approach involved nesting the list type within Annotated, which improved both type hinting and runtime safety for downstream usage. This change directly supports the Gemini roadmap by reducing the risk of type-related errors and strengthening IDE support for developers. The work was implemented using Python, leveraging Pydantic and advanced type hinting techniques to ensure robust type safety. By focusing on this targeted feature, the contribution enables safer and more maintainable future integrations with Gemini models in the codebase.