[agentserver] Refactor tool api

[JC-386]

Description

Please add an informative description that covers that changes made by the pull request and link all relevant issues.

If an SDK is being regenerated based on a new API spec, a link to the pull request containing these API spec changes should be included above.

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• The pull request does not introduce [breaking changes]
• CHANGELOG is updated for new features, bug fixes or other significant changes.
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Testing Guidelines

• Pull request includes test coverage for the included changes.

[melionel]

    # Get tools from AzureAIToolClient

this comment does not make sense

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Refers to: sdk/agentserver/azure-ai-agentserver-langgraph/azure/ai/agentserver/langgraph/tool_client.py:93 in 7ac2d25. [](commit_id = 7ac2d25, deletion_comment = False)

[melionel]

---------------------------------------------------------

why not put this file under 'tools' folder?

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Refers to: sdk/agentserver/azure-ai-agentserver-langgraph/azure/ai/agentserver/langgraph/tool_client.py:1 in 7ac2d25. [](commit_id = 7ac2d25, deletion_comment = False)

[melionel]

    for azure_tool in azure_tools:

rename to foundry_tool ?

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Refers to: sdk/agentserver/azure-ai-agentserver-langgraph/azure/ai/agentserver/langgraph/tool_client.py:100 in 7ac2d25. [](commit_id = 7ac2d25, deletion_comment = False)

[melionel]

    azure_tools = await self._tool_client.list_tools()

missing required arguments ?

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Refers to: sdk/agentserver/azure-ai-agentserver-langgraph/azure/ai/agentserver/langgraph/tool_client.py:97 in 7ac2d25. [](commit_id = 7ac2d25, deletion_comment = False)