draftEmail · Gmail MCP Server MCP: Risk & Policy

WHAT IT DOES

What draftEmail does on Gmail MCP Server

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

WHY IT NEEDS A POLICY

Why draftEmail needs a policy

This tool creates draft emails, which is a reversible modification of data (drafts can be edited or deleted). It does not execute code, destroy data, move money, or trigger external operations beyond Gmail's draft storage.

From the tool's definition Tool is described as 'Create a Gmail draft message' — a write operation that creates new data (draft email) reversibly without sending or permanently deleting content.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

draftEmail Rate-limited

draftEmail 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": {
    "draftEmail": {
      "limits": [
        {
          "counter": "draftemail_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 Gmail MCP Server, so you can run agents against it safely.

FAQ

Questions about draftEmail

What does the draftEmail tool do? +

Create a Gmail draft message. It is categorised as a Write tool in the Gmail 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 draftEmail? +

Register the Gmail MCP Server MCP server in PolicyLayer and add a rule for draftEmail: 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 Gmail MCP Server. Nothing to install.

What risk level is draftEmail? +

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

Can I rate-limit draftEmail? +

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

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

draftEmail is provided by the Gmail MCP Server MCP server (zacco16/gmail-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.