gmail_send_draft · Personal Gmail MCP: Risk & Policy

WHAT IT DOES

What gmail_send_draft does on Personal Gmail

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

WHY IT NEEDS A POLICY

Why gmail_send_draft needs a policy

This tool sends an email draft, which creates/modifies the email system state by transitioning a draft to a sent message. It is reversible (emails can be unsent via Gmail's undo feature within seconds, or archived/deleted afterward). It does not permanently destroy data or move money, so it is Write rather than Destructive or Financial.

From the tool's definition Tool name 'gmail_send_draft' and description 'Send a previously created draft by id' indicates sending/dispatching an email message.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

gmail_send_draft Rate-limited

gmail_send_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": {
    "gmail_send_draft": {
      "limits": [
        {
          "counter": "gmail_send_draft_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Personal Gmail, so you can run agents against it safely.

FAQ

Questions about gmail_send_draft

What does the gmail_send_draft tool do? +

Send a previously created draft by id. It is categorised as a Write tool in the Personal Gmail MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on gmail_send_draft? +

Register the Personal Gmail MCP server in PolicyLayer and add a rule for gmail_send_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 Personal Gmail. Nothing to install.

What risk level is gmail_send_draft? +

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

Can I rate-limit gmail_send_draft? +

Yes. Add a rate_limit block to the gmail_send_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 gmail_send_draft completely? +

Set action: deny in the PolicyLayer policy for gmail_send_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 gmail_send_draft? +

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