untrash_thread · Gmail MCP Server MCP: Risk & Policy

WHAT IT DOES

What untrash_thread does on Gmail MCP Server

AI agents use untrash_thread 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 untrash_thread needs a policy

This tool restores a trashed thread back to the inbox, which is a reversible modification of data state. It does not delete or irreversibly destroy data; it undoes a previous trash action. This is a Write operation with medium severity as it modifies email organization but has limited blast radius.

From the tool's definition Remove a thread from the trash

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

untrash_thread Rate-limited

untrash_thread 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": {
    "untrash_thread": {
      "limits": [
        {
          "counter": "untrash_thread_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 untrash_thread

What does the untrash_thread tool do? +

Remove a thread from the trash. 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 untrash_thread? +

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

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

Can I rate-limit untrash_thread? +

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

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

untrash_thread 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.