Dynamic Threshold for Search Retrieval isn't working.

[anonymousx97]

Environment details

• Programming language: Python
• OS: Linux
• Language runtime version: 3.12.9
• Package version: 1.0.0

Steps to reproduce

import asyncio

from google.genai.client import AsyncClient, Client
from google.genai.types import (
    DynamicRetrievalConfig,
    GenerateContentConfig,
    GoogleSearchRetrieval,
    Tool,
)


async def test(model: str, threshold: int | float, use_search: bool):

    client: Client = Client(api_key=your key)
    async_client: AsyncClient = client.aio

    config = GenerateContentConfig(
        tools=[
            Tool(
                google_search=GoogleSearchRetrieval(
                    dynamic_retrieval_config=DynamicRetrievalConfig(
                        dynamic_threshold=threshold
                    )
                )
            )
        ],
    )

    response = await async_client.models.generate_content(
        contents=[
            "is gemini 2.0 flash released?\nJust answer yes or not with the release date if any."
        ],
        model=model,
        config=config if use_search else None,
    )

    print(response.candidates[0].content.parts[0].text)


asyncio.run(test(model="gemini-2.0-flash", threshold=1, use_search=False))

asyncio.run(test(model="gemini-2.0-flash", threshold=1, use_search=True))

asyncio.run(test(model="gemini-2.0-flash", threshold=0, use_search=True))

Output:

Without search tool:
No. 

Search set to disabled:
Yes, Gemini 2.0 Flash was released on December 11, 2024, as an experimental model. It was made available to all users on the web on January 28, 2025, and developers can now build production applications with it as of February 5, 2025.

Search Set to enabled:
Yes, Gemini 2.0 Flash was released on December 11, 2024, as an experimental model. It is now generally available since February 5, 2025.