emailfolders_rename · M365 MCP: Risk & Policy

WHAT IT DOES

What emailfolders_rename does on M365

AI agents use emailfolders_rename to create or update resources in M365 — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your M365 environment.

WHY IT NEEDS A POLICY

Why emailfolders_rename needs a policy

Renaming an email folder modifies data (the folder metadata) but does not delete data or cause irreversible changes—users can rename folders back if needed. This is a Write category operation. Severity is medium because misuse could disorganize a user's email structure or cause confusion, but the impact is limited to folder naming and is easily reversible.

From the tool's definition Tool name 'emailfolders_rename' indicates modification of email folder names. The server manages Microsoft 365 Outlook, and renaming folders is a reversible write operation on email organization metadata.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

emailfolders_rename Rate-limited

emailfolders_rename 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": {
    "emailfolders_rename": {
      "limits": [
        {
          "counter": "emailfolders_rename_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 M365, so you can run agents against it safely.

FAQ

Questions about emailfolders_rename

What does the emailfolders_rename tool do? +

emailfolders_rename. It is categorised as a Write tool in the M365 MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on emailfolders_rename? +

Register the M365 MCP server in PolicyLayer and add a rule for emailfolders_rename: 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 M365. Nothing to install.

What risk level is emailfolders_rename? +

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

Can I rate-limit emailfolders_rename? +

Yes. Add a rate_limit block to the emailfolders_rename 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 emailfolders_rename completely? +

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

emailfolders_rename is provided by the M365 MCP server (robin-collins/m365-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.