gmail_draft · Mariana Google MCP: Risk & Policy

WHAT IT DOES

What gmail_draft does on Mariana Google MCP

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

WHY IT NEEDS A POLICY

Why gmail_draft needs a policy

This tool creates (Write action) a draft email that remains unsent and can be edited, discarded, or deleted by the user before transmission. The draft does not trigger any external communication or side effects until manually confirmed by the user. This is a classic Write operation—reversible data creation with no destructive or financial impact.

From the tool's definition Tool name 'gmail_draft' and description 'Create a draft email. Does NOT send — the draft appears in Gmail for manual review and sending.' explicitly indicates creation of a reversible, non-transmitted artifact.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

gmail_draft Rate-limited

gmail_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_draft": {
      "limits": [
        {
          "counter": "gmail_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 Mariana Google MCP, so you can run agents against it safely.

FAQ

Questions about gmail_draft

What does the gmail_draft tool do? +

Create a draft email. Does NOT send — the draft appears in Gmail for manual review and sending. It is categorised as a Write tool in the Mariana Google MCP 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_draft? +

Register the Mariana Google MCP server in PolicyLayer and add a rule for gmail_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 Mariana Google MCP. Nothing to install.

What risk level is gmail_draft? +

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

Can I rate-limit gmail_draft? +

Yes. Add a rate_limit block to the gmail_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_draft completely? +

Set action: deny in the PolicyLayer policy for gmail_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_draft? +

gmail_draft is provided by the Mariana Google MCP server (marianasmall/mariana-google-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.