Description
When using auto function calling, any null arguments that the model generates are removed before the function is invoked. If the parameter is required, then the function will fail to be invoked.
Code Sample
import asyncio
from random import randint
from typing import Annotated, Literal
from agent_framework import Agent
from agent_framework.foundry import FoundryChatClient
from azure.identity import AzureCliCredential
from pydantic import Field
def get_weather(
location: Annotated[str, Field(description="The location to get the weather for.")],
unit: Annotated[
Literal["C", "F"] | None,
Field(
description="The unit for temperature. Only set this if the user specified a unit in their query, "
"otherwise set it to null."
),
],
) -> str:
"""Get the weather for a given location."""
conditions = ["sunny", "cloudy", "rainy", "stormy"]
return f"The weather in {location} is {conditions[randint(0, 3)]} with a high of {randint(10, 30)}°{unit or 'C'}."
async def main() -> None:
client = FoundryChatClient(
credential=AzureCliCredential(),
)
agent = Agent(
client=client,
name="WeatherAgent",
instructions="You are a helpful weather agent. Use the get_weather tool to answer questions.",
tools=[get_weather],
)
result = await agent.run("What's the weather like in Seattle?")
print(f"Agent: {result}")
if __name__ == "__main__":
asyncio.run(main())Error Messages / Stack Traces
The model generates the following function call:
{"location":"Seattle","unit":null}If you then inspect the function call result, you get the following:
[{"call_id": "call_6WcSppkJ2mMxLYpHPptu0l40", "type": "function_call_output", "output": "Error: Argument parsing failed."}]Package Versions
agent-framework-core: 1.4.0
Python Version
Python 3.13.6
Additional Context
No response
Description
When using auto function calling, any null arguments that the model generates are removed before the function is invoked. If the parameter is required, then the function will fail to be invoked.
Code Sample
Error Messages / Stack Traces
The model generates the following function call:
{"location":"Seattle","unit":null}If you then inspect the function call result, you get the following:
[{"call_id": "call_6WcSppkJ2mMxLYpHPptu0l40", "type": "function_call_output", "output": "Error: Argument parsing failed."}]Package Versions
agent-framework-core: 1.4.0
Python Version
Python 3.13.6
Additional Context
No response