get_label_by_id

THE RISK

Low Risk

Why get_label_by_id needs a policy

This tool retrieves label metadata by ID. It performs a simple query against Gmail's label data structure without creating, modifying, or deleting any content. The action is read-only with no side effects, matching the Read category definition of 'retrieves or queries data.' The low severity reflects minimal blast radius—an AI agent cannot harm user data, finances, or system integrity by querying label information.

From the tool's definition Tool description states 'Get a single label data from gmail using label id' — a retrieval operation with no modification or deletion capability.

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

POLICY

How to control get_label_by_id

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_label_by_id": {}
  }
}

get_label_by_id is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

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

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Gmail tools

Destructive delete_label Delete a single label from gmail Destructive trash_email Thrash an email. Destructive trash_emails Thrash a list of emails. Write add_labels Assign all emails sent with the labels. Write create_label create_label Write mark_emails_as_read Mark all emails as read. Write mark_emails_as_unread Mark all emails as unread. Write update_label update_label

All 12 Gmail tools →

Read tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_label_by_id

What does the get_label_by_id tool do? +

Get a single label data from gmail using label id. It is categorised as a Read tool in the Gmail MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_label_by_id? +

Register the Gmail MCP server in PolicyLayer and add a rule for get_label_by_id: 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. Nothing to install.

What risk level is get_label_by_id? +

get_label_by_id is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_label_by_id? +

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

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

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

Enforce policy on every Gmail tool call.

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

CHECK YOUR STACK →