Tools In Context Caching


### Description of the bug:

Tools in cached content is not working. If I don't use cached content and declare the tools direct using the example below, my tools work. But if I put the tools inside of cached content (as in the attached image), the model have so many difficulty to call a tool.

Example:
```
model := client.GenerativeModel("gemini-1.5-flash-001")
model.Tools = []*genai.Tool{}
```

The PDF file have 41 pages and I have 17 tools declared, that is returned in g.ToolsDeclarations().

I execute a test, and the tools don't exists in cached content:
Code:


Result:


### Actual vs expected behavior:

_No response_

### Any other information you'd like to share?

_No response_