tool_choice.py
"""
Tool Choice
=============================
Tool Choice Control.
"""
from agno.agent import Agent
from agno.models.openai import OpenAIResponses
def get_weather(city: str) -> str:
return f"Weather data placeholder for {city}: 72F and clear."
# ---------------------------------------------------------------------------
# Create Agents
# ---------------------------------------------------------------------------
no_tools_agent = Agent(
name="No-Tools Agent",
model=OpenAIResponses(id="gpt-5.2"),
tools=[get_weather],
tool_choice="none",
)
auto_tools_agent = Agent(
name="Auto-Tools Agent",
model=OpenAIResponses(id="gpt-5.2"),
tools=[get_weather],
tool_choice="auto",
)
forced_tool_agent = Agent(
name="Forced-Tool Agent",
model=OpenAIResponses(id="gpt-5.2"),
tools=[get_weather],
tool_choice={"type": "function", "name": "get_weather"},
)
# ---------------------------------------------------------------------------
# Run Agents
# ---------------------------------------------------------------------------
if __name__ == "__main__":
prompt = "What is the weather in San Francisco today?"
no_tools_agent.print_response(prompt, stream=True)
auto_tools_agent.print_response(prompt, stream=True)
forced_tool_agent.print_response(prompt, stream=True)
Run the Example
1
Set up your virtual environment
uv venv --python 3.12
source .venv/bin/activate
uv venv --python 3.12
.venv\Scripts\activate
2
Install dependencies
uv pip install -U agno openai
3
Export your OpenAI API key
export OPENAI_API_KEY="your_openai_api_key_here"
$Env:OPENAI_API_KEY="your_openai_api_key_here"
4
Run the example
Save the code above as
tool_choice.py, then run:python tool_choice.py