rename_folder

Rename an existing IMAP folder. Special folders (INBOX, Sent, Drafts, Junk, Trash, Archive, Scheduled) cannot be renamed.

SERVERTrekMail MCP Server SOURCEtrekmail/mcp-server

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/trekmail-mcp-server/rename-folder.md

WHAT IT DOES

What rename_folder does on TrekMail MCP Server

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

RISK

Why rename_folder is rated Medium

Renaming a folder modifies data (the folder's name) but is reversible—the folder and its contents remain intact and the action can be undone by renaming back. This qualifies as Write rather than Execute (no arbitrary code/command execution) or Destructive (no data loss or irreversible deletion).

From the tool's definition Tool description states it 'Rename an existing IMAP folder', which modifies folder metadata. The restriction on special folders indicates this is a reversible operation with guardrails.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs rename_folder safely

PolicyLayer is an MCP gateway: it sits between your AI agents and TrekMail MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For rename_folder, this is the rule to start with:

rename_folder Rate-limited

rename_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": {
    "rename_folder": {
      "limits": [
        {
          "counter": "rename_folder_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect TrekMail MCP Server, apply this rule, and every rename_folder call is checked against it from then on.

FAQ

Questions about rename_folder

What does the rename_folder tool do? +

Rename an existing IMAP folder. Special folders (INBOX, Sent, Drafts, Junk, Trash, Archive, Scheduled) cannot be renamed. It is categorised as a Write tool in the TrekMail 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 rename_folder? +

Register the TrekMail MCP Server MCP server in PolicyLayer and add a rule for rename_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 TrekMail MCP Server. Nothing to install.

What risk level is rename_folder? +

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

Can I rate-limit rename_folder? +

Yes. Add a rate_limit block to the rename_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 rename_folder completely? +

Set action: deny in the PolicyLayer policy for rename_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 rename_folder? +

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

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