send_gmail_message · Sudo Mcp Gmail MCP: Risk & Policy

WHAT IT DOES

What send_gmail_message does on Sudo Mcp Gmail

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

WHY IT NEEDS A POLICY

Why send_gmail_message needs a policy

This tool creates and dispatches email messages, which are new communications that modify the user's sent folder and have effects on external recipients. While not destructive (emails can be recalled/deleted post-send in some cases), and not financial by default, sending unsolicited or malicious emails at scale represents a high-severity Write action.

From the tool's definition Tool name 'send_gmail_message' with description explicitly stating 'Send a Gmail message' with support for CC, BCC, HTML body, and attachments. Server description confirms the ability to 'send emails'.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

send_gmail_message Rate-limited

send_gmail_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": {
    "send_gmail_message": {
      "limits": [
        {
          "counter": "send_gmail_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 Sudo Mcp Gmail, so you can run agents against it safely.

FAQ

Questions about send_gmail_message

What does the send_gmail_message tool do? +

Send a Gmail message with optional CC, BCC, HTML body, and file attachments. It is categorised as a Write tool in the Sudo 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 send_gmail_message? +

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

What risk level is send_gmail_message? +

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

Can I rate-limit send_gmail_message? +

Yes. Add a rate_limit block to the send_gmail_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 send_gmail_message completely? +

Set action: deny in the PolicyLayer policy for send_gmail_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 send_gmail_message? +

send_gmail_message is provided by the Sudo Mcp Gmail MCP server (sahilyadav902/sudo-mcp-gmail). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.