create_reply_draft · Mcp Imap MCP: Risk & Policy

WHAT IT DOES

What create_reply_draft does on Mcp Imap

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

WHY IT NEEDS A POLICY

Why create_reply_draft needs a policy

This tool creates a new email draft as a reply to an existing message. Creating drafts is a reversible write operation—the draft exists but is not yet sent, so it can be modified, discarded, or deleted without permanent consequences. It does not execute arbitrary code, delete data irreversibly, move money, or read existing messages.

From the tool's definition Tool description states 'Create a reply draft' which creates new email content. The tool description explicitly uses the verb 'Create', indicating it generates and stores new data (a draft email) reversibly—drafts can be deleted or modified before sending.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_reply_draft Rate-limited

create_reply_draft 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_reply_draft": {
      "limits": [
        {
          "counter": "create_reply_draft_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 Mcp Imap, so you can run agents against it safely.

FAQ

Questions about create_reply_draft

What does the create_reply_draft tool do? +

Create a reply draft on an existing email thread. Finds the message by UID, sets In-Reply-To and References headers to keep it in the same thread. It is categorised as a Write tool in the Mcp Imap 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_reply_draft? +

Register the Mcp Imap MCP server in PolicyLayer and add a rule for create_reply_draft: 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 Mcp Imap. Nothing to install.

What risk level is create_reply_draft? +

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

Can I rate-limit create_reply_draft? +

Yes. Add a rate_limit block to the create_reply_draft 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_reply_draft completely? +

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

create_reply_draft is provided by the Mcp Imap MCP server (ngcdan/mcp-imap-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.