[BUG] Gemini 3.5 Flash does not support Tool Combinations

Gemini API
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1

Tool Combinations are not working with gemini-3.5-flash I have attached some simple example code that should have the model pull up data using the built in Google Search tool then call a function for a custom schedule tool but 3.5 Flash persistently gives a message saying it does not have access to the Google Search tool while it works with the older 3 Flash Preview. Using Google Search on its own without the function declaration works with 3.5 but not as a tool combination as is written in the API documentation I linked above.

from google import genai
from google.genai import types

client = genai.Client()

schedule_meeting = {
    "name": "schedule_meeting",
    "description": "Schedule a meeting",
    "parameters": {
        "type": "object",
        "properties": {"reason": {"type": "string"}},
        "required": ["reason"],
    },
}

prompt = "What's the weather in Buenos Aires? If it's raining, schedule a meeting."

response = client.models.generate_content(
    model="gemini-3.5-flash",  # Works with gemini-3-flash-preview
    contents=prompt,
    config=types.GenerateContentConfig(
        tools=[
            types.Tool(
                google_search=types.GoogleSearch(),
                function_declarations=[schedule_meeting],
            ),
        ],
        tool_config=types.ToolConfig(
            include_server_side_tool_invocations=True,
        ),
    ),
)

for part in response.candidates[0].content.parts:
    if getattr(part, "tool_call", None):
        print(f"Tool call: {part.tool_call.tool_type} (ID: {part.tool_call.id})")
        print(f"  args: {part.tool_call.args}")
    if getattr(part, "tool_response", None):
        print(
            f"Tool response: {part.tool_response.tool_type} (ID: {part.tool_response.id})"
        )
        print(f"  response: {part.tool_response.response}")
    if getattr(part, "function_call", None):
        print(f"Function call: {part.function_call.name} (ID: {part.function_call.id})")
        print(f"  args: {part.function_call.args}")
    if getattr(part, "text", None):
        print(part.text)
2

Looking into this . thank you for sharing the code snippet

3

Let me know when its fixed thanks. I have users interested in using Gemini 3.5 Flash but I can’t integrate it within my product without it having tool combination support :slight_smile: