teams_remove_favorite · Teams MCP Server MCP: Risk & Policy

WHAT IT DOES

What teams_remove_favorite does on Teams MCP Server

AI agents use teams_remove_favorite to create or update resources in Teams MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Teams MCP Server environment.

WHY IT NEEDS A POLICY

Why teams_remove_favorite needs a policy

Removing a favorite is a reversible write operation (the user can re-add the conversation as a favorite). It does not delete any messages or data, just modifies a user preference/bookmark list. Severity is low as the blast radius is minimal — at worst a conversation is unfavorited and can be re-added.

From the tool's definition 'Remove a conversation from the user' favorites/followed list — reverses the teams_add_favorite action

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

teams_remove_favorite Rate-limited

teams_remove_favorite stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "teams_remove_favorite": {
      "limits": [
        {
          "counter": "teams_remove_favorite_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Teams MCP Server, so you can run agents against it safely.

FAQ

Questions about teams_remove_favorite

What does the teams_remove_favorite tool do? +

Remove a conversation from the user\. It is categorised as a Write tool in the Teams MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on teams_remove_favorite? +

Register the Teams MCP Server MCP server in PolicyLayer and add a rule for teams_remove_favorite: 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 Teams MCP Server. Nothing to install.

What risk level is teams_remove_favorite? +

teams_remove_favorite is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit teams_remove_favorite? +

Yes. Add a rate_limit block to the teams_remove_favorite 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.

How do I block teams_remove_favorite completely? +

Set action: deny in the PolicyLayer policy for teams_remove_favorite. 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.

What MCP server provides teams_remove_favorite? +

teams_remove_favorite is provided by the Teams MCP Server MCP server (m0nkmaster/msteams-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.