[Bug] Agent Playground is not calling code interpreter tool with mistral-small-2503 model

[yingding]

Describe the Feedback

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Created an agent with "mistral-small-2503" model, added "Code interpreter" als tools for the agent.
Prompt the agent in Agent Playground to generate a map using python basemap lib.
The agent is not calling the Code interpreter tool.

Repro Steps

While "mistral-small-2503" is not calling the Code interpreter tool.

The same agent instruction prompt and tooling with "gpt-5-mini" is calling the Code interpreter tool.

Steps to reproduce the behavior:

1. Go to 'Agent Playground'
2. Create an v2 Agent in Foundry UI with "mistral-small-2503" model
3. Add "Code interpreter"
4. Add "Instruction":
   """you are a friendly assistant, use the tools to answer user query, if you don't know "say don't know"

You can use the tools:

• codeinterpreter: for python based coding
  """ and save

5. Prompt "show me a german map using the python basemap lib."

System Information

• OS: MacOSX
• Browser: Microsoft Edge
• Version: Version 142.0.3595.65 (Official build) (arm64)

Labels

Please include relevant labels such as:

• Feature Area: Model Playground, Agent Playground
• Issue: Deployment, UI, Tools