Python: [Bug]: Run Error with Create/Get Agent API for Azure V2: model_deployment_name must be a non-empty string

[mhmtkcm]

Description

I receive the attached error during the agent run phase after creating or using an agent with the get/create APIs in the new Foundry V2 update.

As you can see in the screenshot below, a model has already been chosen.

Code Sample

import asyncio
import os

from agent_framework.azure import AzureAIProjectAgentProvider
from azure.ai.projects.aio import AIProjectClient
from azure.core.exceptions import ResourceNotFoundError
from azure.identity import InteractiveBrowserCredential

async def main():
    credential = InteractiveBrowserCredential()
    async with AIProjectClient(
        endpoint=os.environ["AZURE_AI_FOUNDRY_PROJECT_ENDPOINT"],
        credential=credential,
    ) as project_client:
        provider = AzureAIProjectAgentProvider(project_client=project_client)
        agent_name = "summarizer-agent"
        try:
            agent = await provider.get_agent(name=agent_name)
            print(f"Agent found: {agent.name}")
        except ResourceNotFoundError:
            agent = await provider.create_agent(
                name=agent_name,
                model="gpt-5.2",
                instructions="You are responsible for writing a brief summary of a few sentences on the given subject.",
                description="An agent that summarizes a given subject.",
            )
            print(f"Agent created: {agent.name}")

        response = await agent.run(subject="Artificial Intelligence")
        print("===== Agent Response =====")
        print(response)


if __name__ == "__main__":
    asyncio.run(main())

Error Messages / Stack Traces

File ".../.venv/lib/python3.13/site-packages/agent_framework_azure_ai/_client.py", line 410, in _check_model_presence
    raise ValueError("model_deployment_name must be a non-empty string")
ValueError: model_deployment_name must be a non-empty string

Package Versions

1.0.0b260114

Python Version

3.13

Additional Context

No response

[dmytrostruk]

@mhmtkcm Thanks for reporting this issue! Should be fixed by: #3246.

One note: in your code sample in line:

response = await agent.run(subject="Artificial Intelligence")

I don't think subject is correct parameter here, the correct one would be messages. It is also a first parameter in the method, so you can simply pass a string. Same applies to your code sample in #3229 issue. Thanks!