This is Microsoft's official MCP server for Teams automation through the Graph API. It gives you programmatic access to chats, channels, user management, and message operations without leaving your MCP-enabled environment. You'd reach for this when building agents that need to post updates to Teams channels, search through chat history, manage team memberships, or orchestrate Teams workflows. It runs on Microsoft's agent infrastructure and requires tenant-level authentication, so you'll need proper Azure AD permissions configured. The streamable-http transport means it works with remote MCP setups rather than running locally.