untrash_message · Gmail MCP Server MCP: Risk & Policy

WHAT IT DOES

What untrash_message does on Gmail MCP Server

AI agents use untrash_message 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_message needs a policy

This tool restores a message from trash back to the inbox/original location. It modifies data reversibly (the message can be trashed again), making it a Write operation. It does not delete anything permanently, execute code, or involve financial transactions. Medium severity because it affects email state but is reversible.

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

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

untrash_message Rate-limited

untrash_message 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_message": {
      "limits": [
        {
          "counter": "untrash_message_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_message

What does the untrash_message tool do? +

Remove a message 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_message? +

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

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

Can I rate-limit untrash_message? +

Yes. Add a rate_limit block to the untrash_message 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_message completely? +

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

untrash_message 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.