enable_imap · TrekMail MCP Server MCP: Risk & Policy

WHAT IT DOES

What enable_imap does on TrekMail MCP Server

AI agents use enable_imap 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.

WHY IT NEEDS A POLICY

Why enable_imap needs a policy

This tool performs a configuration modification (enabling a protocol on a mailbox) rather than reading data, so it is Write rather than Read. It does not execute arbitrary code, delete data, or move money, so those categories do not apply.

From the tool's definition The tool 'enable_imap' modifies mailbox configuration by enabling IMAP access, which is a state change to an existing mailbox.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

enable_imap Rate-limited

enable_imap 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": {
    "enable_imap": {
      "limits": [
        {
          "counter": "enable_imap_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 TrekMail MCP Server, so you can run agents against it safely.

FAQ

Questions about enable_imap

What does the enable_imap tool do? +

Enable IMAP access for a mailbox so message tokens can be created. Requires the current mailbox password. 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 enable_imap? +

Register the TrekMail MCP Server MCP server in PolicyLayer and add a rule for enable_imap: 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 enable_imap? +

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

Can I rate-limit enable_imap? +

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

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

enable_imap 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.