gmail_set_vacation_responder · Mcp Gmail MCP: Risk & Policy

WHAT IT DOES

What gmail_set_vacation_responder does on Mcp Gmail

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

WHY IT NEEDS A POLICY

Why gmail_set_vacation_responder needs a policy

This tool modifies Gmail settings by configuring a vacation responder, which creates or updates an auto-reply message. This is a reversible change (can be disabled/modified later), making it Write rather than Execute or Destructive.

From the tool's definition Tool name 'gmail_set_vacation_responder' indicates modification of Gmail account settings (vacation/auto-reply configuration). The 'set' verb and 'responder' functionality implies creating or updating an automatic response rule.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

gmail_set_vacation_responder Rate-limited

gmail_set_vacation_responder 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_set_vacation_responder": {
      "limits": [
        {
          "counter": "gmail_set_vacation_responder_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 Mcp Gmail, so you can run agents against it safely.

FAQ

Questions about gmail_set_vacation_responder

What does the gmail_set_vacation_responder tool do? +

gmail_set_vacation_responder. It is categorised as a Write tool in the Mcp 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_set_vacation_responder? +

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

What risk level is gmail_set_vacation_responder? +

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

Can I rate-limit gmail_set_vacation_responder? +

Yes. Add a rate_limit block to the gmail_set_vacation_responder 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_set_vacation_responder completely? +

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

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