[NingLin Liu (ninglinLiu)]

Motivation & Context

The multimodal input README tells users to set AZURE_OPENAI_ENDPOINT and AZURE_OPENAI_MODEL (listed twice) for the Azure samples, plus optional AZURE_OPENAI_API_VERSION / AZURE_OPENAI_API_KEY. But azure_chat_multimodal.py and azure_responses_multimodal.py both build FoundryChatClient(credential=AzureCliCredential()), which reads its settings with env_prefix="FOUNDRY_" (FOUNDRY_PROJECT_ENDPOINT, FOUNDRY_MODEL) and takes no API key or API version. Following the README leaves the sample failing with Model is required. Set via 'model' parameter or 'FOUNDRY_MODEL' environment variable. The in-code comments in both samples also say Requires AZURE_OPENAI_ENDPOINT and FOUNDRY_MODEL.

Description & Review Guide

• What are the major changes?
  • python/samples/02-agents/multimodal_input/README.md: the Azure section now lists FOUNDRY_PROJECT_ENDPOINT and FOUNDRY_MODEL (the settings FoundryChatClient reads) and notes the az login requirement, replacing the duplicated AZURE_OPENAI_MODEL lines and the API version/key options the client does not use.
  • azure_chat_multimodal.py, azure_responses_multimodal.py: the comment now says Requires FOUNDRY_PROJECT_ENDPOINT and FOUNDRY_MODEL.
• What is the impact of these changes? Documentation/comments only; sample behavior is unchanged.
• What do you want reviewers to focus on? RawFoundryChatClient.__init__ in packages/foundry/agent_framework_foundry/_chat_client.py (env_prefix="FOUNDRY_", the FOUNDRY_MODEL error). The OpenAI section of the README is unchanged and still correct (openai_chat_multimodal.py passes the model explicitly).

Related Issue

N/A - trivial change. Stale environment-variable names in one sample README and two comments; the correction follows what the samples already read, with no behavior change.

AI Assistance

• No material AI assistance was used.
• This is an AI-assisted contribution. I reviewed, understood, and verified all submitted content and accept responsibility for it.

AI assistance details: finding the mismatch (README variables vs. the client settings the samples use), the documentation edit, and this PR description.

Contribution Checklist

• The code builds clean without any errors or warnings
• All unit tests pass, and I have added new tests where possible
• The PR follows the Contribution Guidelines
• This PR links to an agreed issue with no competing open PR, or the Related Issue section documents a trivial-change or repository-automation exception.
• This is not a breaking change. If it is a breaking change, add the breaking change label (or add "[BREAKING]" to the title prefix, before or after any language prefix) — a workflow keeps the label and title prefix in sync automatically.

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[Copilot]

🟢 Approval recommended

The documentation-only changes match the samples’ configuration and authentication requirements, with no unresolved findings.

No open issues 🎉

What changed in this PR

This PR corrects configuration guidance for the Python multimodal input samples to match their use of FoundryChatClient. Changes are limited to documentation and comments; runtime behavior is unchanged.

Changes:

• Replace obsolete Azure OpenAI settings with FOUNDRY_PROJECT_ENDPOINT and FOUNDRY_MODEL.
• Document the az login prerequisite for AzureCliCredential.
• Correct environment-variable names in both Azure sample comments.

File	Description
python/​samples/​02-agents/​multimodal_input/​README.md	Correct required settings and authentication guidance.
python/​samples/​02-agents/​multimodal_input/​azure_responses_multimodal.py	Correct the endpoint variable in a configuration comment.
python/​samples/​02-agents/​multimodal_input/​azure_chat_multimodal.py	Correct the endpoint variable in a configuration comment.

_{Review effort: Balanced}