trashGmailMessage

THE RISK

Medium Risk

Why trashGmailMessage needs a policy

This tool modifies email data by changing its state/location (to Trash) but does not permanently delete it—the message remains recoverable from the Trash folder for a defined retention period. This qualifies as Write (reversible modification) rather than Destructive (irreversible deletion).

From the tool's definition The tool 'trashGmailMessage' moves a Gmail message to Trash, which is a reversible modification of message state rather than permanent deletion. The description explicitly states the action is 'Move...to Trash'.

Documented attack patterns abuse exactly the kind of access trashGmailMessage gives an agent:

POLICY

How to control trashGmailMessage

PolicyLayer is an MCP gateway — it sits between your AI agents and Google Workspace MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for trashGmailMessage:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "trashGmailMessage": {
      "limits": [
        {
          "counter": "trashgmailmessage_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

trashGmailMessage 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.

Create a free account and register Google Workspace MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Google Workspace MCP Server tools

Destructive clearSpreadsheetRange Clears all values from a specific range in a Google Spreadsheet. Destructive deleteCalendarEvent Delete a calendar event. Destructive deleteComment Deletes a comment from the document. Destructive deleteFile Permanently deletes a file or folder from Google Drive. Destructive deleteGmailFilter Delete a Gmail filter. Destructive deleteGmailLabel Delete a Gmail label. Cannot delete system labels. Destructive deleteRange Deletes content within a specified range (start index inclusive, end index exclusive) from Execute updateScriptContent Updates the content of an Apps Script project. You can add multiple script files (Code.gs,

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about trashGmailMessage

What does the trashGmailMessage tool do? +

Move a Gmail message to Trash. It is categorised as a Write tool in the Google Workspace 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 trashGmailMessage? +

Register the Google Workspace MCP Server MCP server in PolicyLayer and add a rule for trashGmailMessage: 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 Google Workspace MCP Server. Nothing to install.

What risk level is trashGmailMessage? +

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

Can I rate-limit trashGmailMessage? +

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

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

trashGmailMessage is provided by the Google Workspace MCP Server MCP server (sputnicyoji/google-workspace-mcp-with-script). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Google Workspace MCP Server tool call.

Start from Google Workspace MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →