create-folder · Outlook MCP Server MCP: Risk & Policy

WHAT IT DOES

What create-folder does on Outlook MCP Server

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

WHY IT NEEDS A POLICY

Why create-folder needs a policy

This tool creates a new folder, which is a reversible modification to the user's email organization. It does not delete data (not Destructive), execute arbitrary code (not Execute), involve financial transactions (not Financial), or merely read data (not Read). The severity is medium because misuse could clutter the email account or create confusion, but the operation is fully reversible by deleting the folder.

From the tool's definition Tool name 'create-folder' and description 'Creates a new mail folder' indicate a write operation that modifies email account structure by adding a new folder.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create-folder Rate-limited

create-folder 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": {
    "create-folder": {
      "limits": [
        {
          "counter": "create-folder_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 Outlook MCP Server, so you can run agents against it safely.

FAQ

Questions about create-folder

What does the create-folder tool do? +

Creates a new mail folder. It is categorised as a Write tool in the Outlook 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 create-folder? +

Register the Outlook MCP Server MCP server in PolicyLayer and add a rule for create-folder: 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 Outlook MCP Server. Nothing to install.

What risk level is create-folder? +

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

Can I rate-limit create-folder? +

Yes. Add a rate_limit block to the create-folder 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 create-folder completely? +

Set action: deny in the PolicyLayer policy for create-folder. 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 create-folder? +

create-folder is provided by the Outlook MCP Server MCP server (peacockery-studio/outlook-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.