Fix(agent-init): replace max_tokens with max_completion_tokens for connection check of Azure OpenAI service

[mainred]

---

Before this check, when validating gpt-5, it raises the following error, while it works for gpt-4.1 though.

Please re-run `az aks agent-init` to correct the input parameters. Client error: 400 Client Error: Bad Request for url: https://qinhao-ai.openai.azure.com/openai/deployments/gpt-5/chat/completions?api-version=2025-04-01-preview - {
  "error": {
    "message": "Unsupported parameter: 'max_tokens' is not supported with this model. Use 'max_completion_tokens' instead.",
    "type": "invalid_request_error",
    "param": "max_tokens",
    "code": "unsupported_parameter"
  }
}

This checklist is used to make sure that common guidelines for a pull request are followed.

Related command

General Guidelines

• Have you run azdev style <YOUR_EXT> locally? (pip install azdev required)
• Have you run python scripts/ci/test_index.py -q locally? (pip install wheel==0.30.0 required)
• My extension version conforms to the Extension version schema

For new extensions:

• My extension description/summary conforms to the Extension Summary Guidelines.

About Extension Publish

There is a pipeline to automatically build, upload and publish extension wheels.
Once your pull request is merged into main branch, a new pull request will be created to update src/index.json automatically.
You only need to update the version information in file setup.py and historical information in file HISTORY.rst in your PR but do not modify src/index.json.

[azure-client-tools-bot-prd]

️✔️Azure CLI Extensions Breaking Change Test

️✔️Non Breaking Changes

[yonzhan]

Thank you for your contribution! We will review the pull request and get back to you soon.

[github-actions]

The git hooks are available for azure-cli and azure-cli-extensions repos. They could help you run required checks before creating the PR.

Please sync the latest code with latest dev branch (for azure-cli) or main branch (for azure-cli-extensions).
After that please run the following commands to enable git hooks:

pip install azdev --upgrade
azdev setup -c <your azure-cli repo path> -r <your azure-cli-extensions repo path>

[mainred]

cc @yanzhudd

[github-actions]

• For more info about extension versioning, please refer to Extension version schema

[Copilot]

Pull Request Overview

This PR updates the Azure OpenAI provider to use the newer max_completion_tokens parameter instead of the deprecated max_tokens parameter for connection validation, aligning with the API version 2025-04-01-preview. The version is bumped from 1.0.0b10 to 1.0.0b11.

• Changed API parameter from max_tokens to max_completion_tokens in Azure OpenAI connection validation
• Added TODO comment about leveraging litellm for connection checks
• Updated version and release history

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
src/aks-agent/setup.py	Bumps version from 1.0.0b10 to 1.0.0b11
src/aks-agent/azext_aks_agent/agent/llm_providers/base.py	Adds TODO comment for future improvement to use litellm
src/aks-agent/azext_aks_agent/agent/llm_providers/azure_provider.py	Updates connection validation to use max_completion_tokens instead of max_tokens
src/aks-agent/HISTORY.rst	Documents the fix in release notes and fixes capitalization

[azclibot]

[Release] Update index.json for extension [ aks-agent-1.0.0b11 ] : https://dev.azure.com/msazure/One/_build/results?buildId=143173826&view=results