teams_edit_message · Teams MCP Server MCP: Risk & Policy

WHAT IT DOES

What teams_edit_message does on Teams MCP Server

AI agents use teams_edit_message 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_edit_message needs a policy

This tool modifies existing messages reversibly—edits can be undone by further edits. It does not delete, execute code, move money, or read sensitive data. While it changes data in Teams (Write category), the scope is limited to the user's own messages and the changes are reversible, making it medium severity rather than high.

From the tool's definition Tool name is 'teams_edit_message' and description states 'Edit one of your own messages', explicitly indicating modification of existing data. The restriction 'You can only edit messages you sent' confirms it operates on user-owned content only.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

teams_edit_message Rate-limited

teams_edit_message 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_edit_message": {
      "limits": [
        {
          "counter": "teams_edit_message_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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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_edit_message

What does the teams_edit_message tool do? +

Edit one of your own messages (same markdown and @mention rules as teams_send_message: people @[Name](mri), channel tags @[TagName](tag:tagId) from teams_get_tags). You can only edit messages you sent. 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_edit_message? +

Register the Teams MCP Server MCP server in PolicyLayer and add a rule for teams_edit_message: 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_edit_message? +

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

Can I rate-limit teams_edit_message? +

Yes. Add a rate_limit block to the teams_edit_message 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_edit_message completely? +

Set action: deny in the PolicyLayer policy for teams_edit_message. 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_edit_message? +

teams_edit_message 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.