Microsoft.Agents.A365.Tooling.Extensions.AgentFramework

Microsoft.Agents.A365.Tooling.Extensions.AgentFramework

Microsoft Agent Framework integration for the Microsoft Agent 365 Tooling SDK. Provides MCP (Model Context Protocol) tool server discovery and registration for agents built with Microsoft.Extensions.AI and Microsoft.Agents.AI.

Installation

dotnet add package Microsoft.Agents.A365.Tooling.Extensions.AgentFramework

Key Features

• MCP tool discovery — queries the Agent 365 Tooling Gateway and connects to configured MCP servers
• AddToolServersToAgent — builds an AIAgent with MCP tools loaded alongside any existing tools
• GetMcpToolsAsync — returns discovered MCP tools as IList<AITool> for manual agent wiring
• SendChatHistoryAsync — forwards conversation history to the real-time threat-protection endpoint
• V1/V2 per-audience token support — V1 servers share the ATG token; V2 servers (distinct audience) receive audience-scoped OBO tokens automatically
• Dev-mode support — tokens sourced from environment variables when ASPNETCORE_ENVIRONMENT=Development

Service Registration

using Microsoft.Agents.A365.Tooling.Extensions.AgentFramework.Extensions;

// Program.cs
builder.Services.AddMcpServices();

AddMcpServices() registers:

• IMcpToolServerConfigurationService → McpToolServerConfigurationService (scoped)
• IMcpToolRegistrationService → McpToolRegistrationService (scoped)

Usage

Adding MCP tools to an agent

using Microsoft.Agents.A365.Tooling.Extensions.AgentFramework.Services;
using Microsoft.Agents.Builder.App.UserAuth;
using Microsoft.Extensions.AI;

public class MyActivityHandler : ActivityHandler
{
    private readonly IMcpToolRegistrationService _mcpTools;
    private readonly IChatClient _chatClient;

    public MyActivityHandler(IMcpToolRegistrationService mcpTools, IChatClient chatClient)
    {
        _mcpTools = mcpTools;
        _chatClient = chatClient;
    }

    protected override async Task OnMessageActivityAsync(ITurnContext<IMessageActivity> turnContext, CancellationToken cancellationToken)
    {
        var userAuth = turnContext.Activity.GetUserAuthorization();

        var agent = await _mcpTools.AddToolServersToAgent(
            chatClient: _chatClient,
            agentInstructions: "You are a helpful assistant.",
            initialTools: [],
            agentUserId: turnContext.Activity.From.Id,
            userAuthorization: userAuth,
            authHandlerName: "default",
            turnContext: turnContext);

        var response = await agent.CompleteAsync(turnContext.Activity.Text, cancellationToken: cancellationToken);
        await turnContext.SendActivityAsync(response.Message.Text, cancellationToken: cancellationToken);
    }
}

Retrieving tools without building an agent

IList<AITool> tools = await _mcpTools.GetMcpToolsAsync(
    agentUserId: turnContext.Activity.From.Id,
    userAuthorization: userAuth,
    authHandlerName: "default",
    turnContext: turnContext);

Sending chat history

// From a list of ChatMessage objects
OperationResult result = await _mcpTools.SendChatHistoryAsync(chatMessages, turnContext, cancellationToken);

Authentication

Production

Token acquisition is automatic. The service uses the Agent Framework UserAuthorization and authHandlerName parameters to perform agentic OBO token exchange via AgenticMcpTokenProvider.

• V1 servers (no audience field, or audience matches the ATG App ID) — receive the shared ATG-scoped token.
• V2 servers (audience identifies a different application) — receive a token scoped to {audience}/{scope} or {audience}/.default.

Local development

Set ASPNETCORE_ENVIRONMENT=Development (or DOTNET_ENVIRONMENT=Development). Tokens are read from environment variables instead of the OBO flow:

Example: for a server named my-mcp-server, set BEARER_TOKEN_MY_MCP_SERVER.

Environment Variables

Trademarks

Microsoft, Windows, Microsoft Azure and/or other Microsoft products and services referenced in the documentation may be either trademarks or registered trademarks of Microsoft in the United States and/or other countries. The licenses for this project do not grant you rights to use any Microsoft names, logos, or trademarks. Microsoft's general trademark guidelines can be found at http://go.microsoft.com/fwlink/?LinkID=254653.

License

Copyright (c) Microsoft Corporation. All rights reserved.

Licensed under the MIT License - see the LICENSE file for details.