My kingdom for a built in tool example like CalendarToolSet for google calendar.

**Is your feature request related to a problem? Please describe.**

There are no working examples for the built in oauth google tools like calendar, drive, etc.

**Describe the solution you'd like**

Even gemini would love a simple example of how to use the built in tools like CalendarToolSet

**Describe alternatives you've considered**

I tried asking gemin, but it invented apis.

**Additional context**

[Some examples of built in tools exist, just not for built in oauth/google workspace tools.](https://github.com/google/adk-docs/tree/main/examples/python/snippets/tools/built-in-tools)