stop_mail_watch · Gmail MCP Server MCP: Risk & Policy

WHAT IT DOES

What stop_mail_watch does on Gmail MCP Server

AI agents use stop_mail_watch 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 stop_mail_watch needs a policy

This tool modifies the notification/watch configuration for a mailbox by stopping push notifications. It changes a persistent setting (reversibly, as watching can be re-enabled), making it a Write operation. Misuse could cause an AI agent or user to miss incoming email notifications, but it does not delete data or move money.

From the tool's definition Stop receiving push notifications for the given user mailbox

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

stop_mail_watch Rate-limited

stop_mail_watch 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": {
    "stop_mail_watch": {
      "limits": [
        {
          "counter": "stop_mail_watch_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 stop_mail_watch

What does the stop_mail_watch tool do? +

Stop receiving push notifications for the given user mailbox. 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 stop_mail_watch? +

Register the Gmail MCP Server MCP server in PolicyLayer and add a rule for stop_mail_watch: 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 stop_mail_watch? +

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

Can I rate-limit stop_mail_watch? +

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

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

stop_mail_watch is provided by the Gmail MCP Server MCP server (nk900600/gmail-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.