async def close(self) -> None:
    """Performs cleanup and releases resources held by the toolset.

    NOTE: This method is invoked, for example, at the end of an agent server's
    lifecycle or when the toolset is no longer needed. Implementations
    should ensure that any open connections, files, or other managed
    resources are properly released to prevent leaks.
    """
Performs cleanup and releases resources held by the toolset.

    NOTE: This method is invoked, for example, at the end of an agent server's
    lifecycle or when the toolset is no longer needed. Implementations
    should ensure that any open connections, files, or other managed
    resources are properly released to prevent leaks.
    
src/google/adk/tools/base_toolset.py