List your recent direct messages and group chats in Teams.
AI agents call teams_list_chats to retrieve information from Microsoft Teams without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns a list of existing chats without creating, modifying, deleting, or executing any operations. It is a pure read operation with minimal blast radius—an AI agent misusing it could only enumerate chats the user already has access to.
From the tool's definition Tool name 'teams_list_chats' and description 'List your recent direct messages and group chats in Teams' indicate a retrieval operation with no modifications or side effects.
Attacks that exploit this kind of access
List your recent direct messages and group chats in Teams. It is categorised as a Read tool in the Microsoft Teams MCP Server, which means it retrieves data without modifying state.
Register the Microsoft Teams MCP server in PolicyLayer and add a rule for teams_list_chats: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Microsoft Teams. Nothing to install.
teams_list_chats is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the teams_list_chats rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for teams_list_chats. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
teams_list_chats is provided by the Microsoft Teams MCP server (microsoft-teams-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
teams_list_chats is one line of Microsoft Teams's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
Teams ship this data inside their own products. See what a licence covers →