Sandbox::https://github.com/dotnet/extensions/pull/6664

jozkee · 2025-07-30T03:05:14Z

Contributes to #6492; addresses 1. and 2.

Microsoft Reviewers: Open in CodeFlow

Copilot

Pull Request Overview

This PR adds abstraction for remote MCP (Model Context Protocol) servers, providing types to represent hosted MCP server tools and their associated content types. The changes introduce new classes for configuring and interacting with remote MCP servers through AI services.

Introduces HostedMcpServerTool class for representing remote MCP server configurations
Adds content types for MCP tool calls and results (HostedMcpServerToolCallContent, HostedMcpServerToolResultContent)
Implements approval mode configuration for MCP server tool calls

Reviewed Changes

Copilot reviewed 9 out of 16 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/Libraries/Microsoft.Extensions.AI.Abstractions/Tools/HostedMcpServerTool.cs	Main abstraction class for configuring hosted MCP servers with URL, approval modes, and headers
src/Libraries/Microsoft.Extensions.AI.Abstractions/HostedMcpServerToolApprovalMode.cs	Approval mode configuration class with Always/Never predefined modes and custom tool-specific rules
src/Libraries/Microsoft.Extensions.AI.Abstractions/Contents/HostedMcpServerToolCallContent.cs	Content type representing MCP tool call requests with call ID, tool name, and arguments
src/Libraries/Microsoft.Extensions.AI.Abstractions/Contents/HostedMcpServerToolResultContent.cs	Content type representing MCP tool call results with output and error information
test/Libraries/Microsoft.Extensions.AI.Abstractions.Tests/Tools/HostedMcpServerToolTests.cs	Unit tests for HostedMcpServerTool functionality
test/Libraries/Microsoft.Extensions.AI.Abstractions.Tests/HostedMcpServerToolApprovalModeTests.cs	Unit tests for approval mode configuration
test/Libraries/Microsoft.Extensions.AI.Abstractions.Tests/Contents/HostedMcpServerToolCallContentTests.cs	Unit tests for tool call content type
test/Libraries/Microsoft.Extensions.AI.Abstractions.Tests/Contents/HostedMcpServerToolResultContentTests.cs	Unit tests for tool result content type
test/Libraries/Microsoft.Extensions.AI.OpenAI.Tests/OpenAIResponseClientIntegrationTests.cs	Integration tests demonstrating MCP server usage with OpenAI client

jozkee · 2025-08-19T03:17:39Z

This should be ready for another round.

jozkee · 2025-09-08T19:18:22Z

Thanks, @stephentoub.

* Simpfliy Responses streaming handling * Add abstraction for remote MCP servers * Update MCP support to accomodate responses and approvals --------- Co-authored-by: Stephen Toub <stoub@microsoft.com>

jozkee requested review from Copilot, rogerbarreto and stephentoub July 30, 2025 03:05

jozkee requested a review from a team as a code owner July 30, 2025 03:05

github-actions Bot added the area-ai Microsoft.Extensions.AI libraries label Jul 30, 2025

dotnet-policy-service Bot assigned jozkee Jul 30, 2025

Copilot AI reviewed Jul 30, 2025

View reviewed changes

Comment thread test/Libraries/Microsoft.Extensions.AI.OpenAI.Tests/OpenAIResponseClientIntegrationTests.cs Resolved

Comment thread src/Libraries/Microsoft.Extensions.AI.Abstractions/Tools/HostedMcpServerTool.cs Resolved