Teams MCP (Ritchy-EU/teams-mcp) is an MCP server listed on the M8ven Trust Index. It scores 67 out of 100, grade C. It declares 28 tools. No publisher has claimed this listing.
Enables AI assistants to interact with Microsoft Teams, users, and organizational data via Microsoft Graph APIs, including sending messages, managing chats and channels, and searching messages.
Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.
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The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.
These names and descriptions are the publisher's own, read from the source code. We print them as written. Our assessment is the findings above, not this list.
auth_statusCheck the authentication status of the Microsoft Graph connection. Returns whether the user is authenticated and shows their basic profile information.
start_authenticationStart Microsoft Teams authentication via device code flow. Returns a URL and code for the user to complete sign-in in their browser. Use this when auth_status shows not authenticated.
list_chatsList all recent chats (1:1 conversations and group chats) that the current user participates in. Returns chat topics, types, and participant information.
get_chat_messagesRetrieve recent messages from a specific chat conversation. Returns message content, sender information, and timestamps.
send_chat_messageSend a message to a specific chat conversation. Supports text and markdown formatting, mentions, and importance levels.
create_chatCreate a new chat conversation. Can be a 1:1 chat (with one other user) or a group chat (with multiple users). Group chats can optionally have a topic.
update_chat_messageUpdate (edit) a chat message that was previously sent. Only the message sender can update their own messages. Supports updating content with text or Markdown formatting, mentions, and importance levels.
delete_chat_messageSoft delete a chat message that was previously sent. Only the message sender can delete their own messages. The message will be marked as deleted but can still be seen as '[This message has been deleted]'.
download_chat_attachmentDownload files and images from a chat message. Handles both inline images (hosted content) and file attachments (OneDrive/SharePoint references). Use get_chat_messages first to see available attachments.
get_user_managerGet the manager of a user. Returns the user's direct manager with their profile information. If no userId is provided, returns the current user's manager.
get_direct_reportsGet the direct reports of a user. Returns a list of users who report directly to the specified user. If no userId is provided, returns the current user's direct reports.
get_manager_chainGet the full chain of managers for a user, from their direct manager up to the top of the organization. Useful for understanding the reporting hierarchy.
search_messagesget_my_mentionsFind recent messages where the current user was @mentioned across all Teams channels and chats.
list_teamsList all Microsoft Teams that the current user is a member of. Returns team names, descriptions, and IDs.
list_channelsList all channels in a specific Microsoft Team. Returns channel names, descriptions, types, and IDs for the specified team.
get_channel_messagesRetrieve recent messages from a specific channel in a Microsoft Team. Returns message content, sender information, and timestamps.
send_channel_messageSend a message to a specific channel in a Microsoft Team. Supports text and markdown formatting, mentions, and importance levels.
get_channel_message_repliesGet all replies to a specific message in a channel. Returns reply content, sender information, and timestamps.
reply_to_channel_messageReply to a specific message in a channel. Supports text and markdown formatting, mentions, and importance levels.
list_team_membersList all members of a specific Microsoft Team. Returns member names, email addresses, roles, and IDs.
search_users_for_mentionsSearch for users to mention in messages. Returns users with their display names, email addresses, and mention IDs.
download_message_hosted_contentDownload hosted content (such as images) from a Teams channel message. Returns the content as base64 encoded data along with metadata. Use this to retrieve images or other inline content embedded in messages.
delete_channel_messageSoft delete a message in a channel. Only the message sender can delete their own messages. The message will be marked as deleted.
update_channel_messageUpdate (edit) a message in a channel that was previously sent. Only the message sender can update their own messages.
get_current_userGet the current authenticated user's profile information including display name, email, job title, and department.
search_usersSearch for users in the organization by name or email address. Returns matching users with their basic profile information.
get_userGet detailed information about a specific user by their ID or email address. Returns profile information including name, email, job title, and department.
Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
When Vitest UI server is listening, arbitrary file can be read and executed
DOMPurify's ADD_TAGS function form bypasses FORBID_TAGS due to short-circuit evaluation
DOMPurify USE_PROFILES prototype pollution allows event handlers
DOMPurify ADD_ATTR predicate skips URI validation
DOMPurify: Permanent `ALLOWED_ATTR` pollution via `setConfig()` bypassing the hook clone-guard (incomplete fix of the 3.4.7 hook-pollution patch)
AUTH_TOKENAZURE_CLIENT_IDAZURE_CLIENT_SECRETAZURE_TENANT_IDBASE_URLPORTTool annotations
No tools have read-only/destructive annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
28/28 tools missing one or more hints — auth_status (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); start_authentication (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); list_chats (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +25 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
Descriptions match behaviour
1 tool describes read intent but its handler mutates — download_message_hosted_content (line 898: hostedContentRegex.exec(bodyContent))
Rename the tool, rewrite the description, or move the side-effect into a separate clearly-named tool.
Tool inputs are validated
22/28 tool handlers declare input schemas (79%)
Declare an inputSchema with zod/joi/yup on every tool definition.
Tool handlers catch errors
27/28 tool handlers wrap calls in try/catch (96%)
Wrap each tool handler body in try/catch and return a structured error response.
Shell command execution
4 child_process calls — runs shell commands
Prefer library functions over shell-outs. If you must shell out, ensure all inputs are properly escaped.
Production dependencies are patched
7 medium severity in production deps
Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.
Dev dependencies
1 critical/high in dev-only deps (does not ship to users)
Upgrade dev dependencies when convenient.
Dependency freshness
1/14 production deps stale: @types/marked@2023-10-03 (2.7y)
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