Agent tools are not propagated to Llm query

[Vatavuk]

Agent tools are not passed to LLM as function calls when using Gemini as BaseLlm. Tools field in LlmRequest is empty in Gemini class.

To Reproduce
Steps to reproduce the behavior:

LlmAgent.builder()
        .name("My agent")
        .description("Some desc")
        .model("gemini-2.0-flash")
        .instruction("You are ahelpful agent for solving crimes")
        .tools(CustomTool("solve_crimes", "Will solve a crime"))
        .build()

class CustomTool(val name: String, val description: String) : BaseTool(name, description)

The tool is never triggered. (The behavior is the same with pre-build tools)

Expected behavior
Should include the tool in function call towards llm.

Desktop:

• OS: [macOS]
• Java version: openjdk-24
• ADK version: 0.1.0

[Poggecci]

The system prompt tries to guide the LllmAgent for when to do the tool call. Could you include an example where you explicitly say when the agent should call the tool and then send a request which would exactly meet that criteria? It's possible that your prompt may just not have triggered a tool call. We have some tool call examples in https://google.github.io/adk-docs/tools/function-tools/#java so please let us know if these still yield issues!