Python: Fix Azure AI sample errors

[giles17]

Summary

Fixes multiple failing Azure AI samples and a bug where V1 SDK hosted tools (FileSearchTool, CodeInterpreterTool, etc.) were silently dropped during agent
creation.

Sample Fixes

1. azure_ai_with_application_endpoint.py - Added missing name to Agent() constructor. Without it, the AzureAIClient has no agent_name and raises
   ServiceInitializationError.

2. azure_ai_with_file_search.py - Fixed resource path: Path(__file__).parents[2] resolved to samples/02-agents instead of samples/. Changed to
   parents[3] to correctly reach samples/shared/resources/employees.pdf.

3. azure_ai_with_openapi.py - Same path fix as above for countries.json.

4. azure_ai_with_session.py - Two issues:

   • Used create_session(service_session_id=...) but create_session does not accept that parameter. Changed to get_session(service_session_id=...).
   • Used create_agent for the second agent instance, which creates a new agent version that does not share conversation history. Changed to get_agent to reuse
     the existing agent version.

5. azure_ai_agent/azure_ai_with_file_search.py - Fixed resource path to reach samples/shared/resources/employees.pdf.

6. azure_ai_agent/azure_ai_with_openapi_tools.py - Fixed resource path to reach samples/shared/resources/weather.json.

Bug Fix: V1 SDK hosted tools dropped during agent creation

AzureAIAgentsProvider.create_agent filtered tools with isinstance(tool, (FunctionTool, MutableMapping)). V1 SDK tool types like FileSearchTool inherit
from Tool (ABC), not MutableMapping, so they were silently dropped. Agents were created on the server without file search or other hosted tools configured.

• create_agent: Replaced the restrictive isinstance filter with a simple MCPTool exclusion. All non-MCP tools now pass through to
  to_azure_ai_agent_tools, which already handles FunctionTool, SDK Tool types (via hasattr(tool, "definitions")), and dicts.

• _merge_tools: Removed code that re-added hosted tool dicts from the server agent definition to local tools. Hosted tools are already on the server and are
  read back at run time via agent_definition.tools. Re-adding them locally caused duplicate tool errors (Unknown parameter: 'tools[1].vector_store_ids').

Validation

• uv run ruff check and uv run ruff format --check pass on all changed files
• uv run pytest packages/azure-ai/tests/ -q — all tests pass

[Copilot]

Pull request overview

Fixes broken Azure AI Python samples under python/samples/02-agents/providers/azure_ai so they run successfully with the current Agent Framework Azure AI client/provider APIs.

Changes:

• Add a required agent name when constructing Agent(AzureAIClient(...)) so AzureAIClient can resolve/create an agent reference.
• Fix sample resource paths to correctly locate python/samples/shared/resources/* from the provider sample directory.
• Correct session/agent rehydration logic to reuse an existing agent version and attach an existing service_session_id.

Reviewed changes

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

File	Description
python/samples/02-agents/providers/azure_ai/azure_ai_with_session.py	Uses get_agent(...) and get_session(service_session_id=...) to correctly continue a server-managed session.
python/samples/02-agents/providers/azure_ai/azure_ai_with_openapi.py	Updates resource path resolution to load countries.json from samples/shared/resources.
python/samples/02-agents/providers/azure_ai/azure_ai_with_file_search.py	Updates resource path resolution to load employees.pdf from samples/shared/resources.
python/samples/02-agents/providers/azure_ai/azure_ai_with_application_endpoint.py	Provides Agent.name so the underlying AzureAIClient has an agent name to operate with.

[markwallace-microsoft]

Python Test Coverage Report •

File	Stmts	Miss	Cover	Missing
packages/azure-ai/agent_framework_azure_ai
_agent_provider.py	110	1	99%	249
TOTAL	21156	3325	84%

Python Unit Test Overview

Tests	Skipped	Failures	Errors	Time
4164	239 💤	0 ❌	0 🔥	1m 14s ⏱️