star_email · Gmail Drive MCP: Risk & Policy

WHAT IT DOES

What star_email does on Gmail Drive

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

WHY IT NEEDS A POLICY

Why star_email needs a policy

An AI agent can call star_email faster than any human can review — one bad instruction and it creates or modifies resources in Gmail Drive by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

star_email Rate-limited

star_email 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": {
    "star_email": {
      "limits": [
        {
          "counter": "star_email_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 Drive, so you can run agents against it safely.

FAQ

Questions about star_email

What does the star_email tool do? +

Star an email. It is categorised as a Write tool in the Gmail Drive MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on star_email? +

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

What risk level is star_email? +

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

Can I rate-limit star_email? +

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

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

star_email is provided by the Gmail Drive MCP server (smitpatel-31/gmail-drive-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.