delete_folder

SERVERTrekMail MCP Server SOURCEtrekmail/mcp-server

Critical RISK CLASS

Category Destructive

Parameters 00 required

Recommended Hiddensee the rule below

Registry record Grade F, identity unverified Pull the record →

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

WHAT IT DOES

What delete_folder does on TrekMail MCP Server

AI agents call delete_folder to permanently remove resources in TrekMail MCP Server, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.

RISK

Why delete_folder is rated Critical

This tool irreversibly deletes email folders and their contents without possibility of recovery. It is a classic destructive operation: data is permanently removed and cannot be undone through normal means. The requirement for an explicit destructive flag confirms the developers' intent to categorize it as destructive.

From the tool's definition Tool name is 'delete_folder'; description explicitly states 'Delete a leaf IMAP folder and all messages it contains' and requires 'TREKMAIL_ALLOW_DESTRUCTIVE=true', indicating irreversible deletion of data.

Risk signalsBulk/mass operation — affects multiple targets

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs delete_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 delete_folder, this is the rule to start with:

delete_folder Hidden

delete_folder is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "delete_folder"
  ]
}

RESTRICT 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 delete_folder call is checked against it from then on.

FAQ

Questions about delete_folder

What does the delete_folder tool do? +

Delete a leaf IMAP folder and all messages it contains. A folder with child folders is rejected; delete its children explicitly first. Special folders cannot be deleted. Requires TREKMAIL_ALLOW_DESTRUCTIVE=true. It is categorised as a Destructive tool in the TrekMail MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on delete_folder? +

Register the TrekMail MCP Server MCP server in PolicyLayer and add a rule for delete_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 delete_folder? +

delete_folder is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit delete_folder? +

Yes. Add a rate_limit block to the delete_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 delete_folder completely? +

Set action: deny in the PolicyLayer policy for delete_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 delete_folder? +

delete_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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