gmail_create_label · Gmail MCP Server MCP: Risk & Policy

WHAT IT DOES

What gmail_create_label does on Gmail MCP Server

AI agents use gmail_create_label 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 gmail_create_label needs a policy

This tool creates new labels in Gmail, which is a reversible modification of the user's email organization system. It does not delete, execute code, or involve financial transactions. While labels can be deleted later, the creation itself is a Write operation.

From the tool's definition Tool description states 'Create a new Gmail label' and 'Returns the new label', indicating creation of a new data entity (label) that modifies the user's Gmail configuration.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

gmail_create_label Rate-limited

gmail_create_label 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_create_label": {
      "limits": [
        {
          "counter": "gmail_create_label_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 gmail_create_label

What does the gmail_create_label tool do? +

Create a new Gmail label with optional custom colors. Returns the new label. 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 gmail_create_label? +

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

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

Can I rate-limit gmail_create_label? +

Yes. Add a rate_limit block to the gmail_create_label 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_create_label completely? +

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

gmail_create_label is provided by the Gmail MCP Server MCP server (murphy360/mcp_gmail). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.