.NET: Add Foundry Agents Tool Sample - Local MCP

[rogerbarreto]

Motivation and Context

• Python: Integrate directly with Foundry Tools from agents using any chat clients #3674

Description

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the Contribution Guidelines
• All unit tests pass, and I have added new tests where possible
• Is this a breaking change? If yes, add "[BREAKING]" prefix to the title of the PR.

[Copilot]

Pull request overview

Adds a new .NET GettingStarted “FoundryAgents” sample that demonstrates using an MCP server from the client side (local MCP over HTTP) and passing the resolved tools into an Azure Foundry Agent.

Changes:

• Introduces a new Step27 sample that connects to the Microsoft Learn MCP endpoint via HttpClientTransport and lists/uses discovered tools.
• Wraps MCP tools with a delegating function to log tool invocations locally.
• Adds README + project file for running the new sample.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
dotnet/samples/GettingStarted/FoundryAgents/FoundryAgents_Step27_LocalMCP/README.md	Documents prerequisites, configuration, and expected behavior for the local MCP sample.
dotnet/samples/GettingStarted/FoundryAgents/FoundryAgents_Step27_LocalMCP/Program.cs	Implements the sample: connect to MCP over HTTP, wrap tools for logging, create/run/delete agent.
dotnet/samples/GettingStarted/FoundryAgents/FoundryAgents_Step27_LocalMCP/FoundryAgents_Step27_LocalMCP.csproj	Adds the executable project targeting net10.0 with required package/project references.