remove_label_from_message

THE RISK

Medium Risk

Why remove_label_from_message needs a policy

Removing a label changes the categorization/organization of an email message. This is a metadata modification (Write) that is reversible since labels can be re-added. It does not delete the message itself, execute code, or have financial implications. Misuse could disrupt email organization (e.g., removing important labels like INBOX or UNREAD), giving it medium severity.

From the tool's definition "Remove a label from a message" — modifies message metadata by removing a label, which is a reversible write operation

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

POLICY

How to control remove_label_from_message

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

policy.json

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

remove_label_from_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.

Create a free account and register Mcp Gmail — 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 Mcp Gmail tools

Write compose_email compose_email Write add_label_to_message Add a label to a message. Write mark_message_read Mark a message as read by removing the UNREAD label. Write send_email Compose and send an email. Read get_emails Get the content of multiple email messages by their IDs. Read list_available_labels Get all available Gmail labels for the user. Read query_emails Search for emails using a raw Gmail query string. Read search_emails search_emails

All 9 Mcp Gmail tools →

Write 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.
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 remove_label_from_message

What does the remove_label_from_message tool do? +

Remove a label from a message. It is categorised as a Write tool in the 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 remove_label_from_message? +

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

What risk level is remove_label_from_message? +

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

Can I rate-limit remove_label_from_message? +

Yes. Add a rate_limit block to the remove_label_from_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 remove_label_from_message completely? +

Set action: deny in the PolicyLayer policy for remove_label_from_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 remove_label_from_message? +

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

Enforce policy on every Mcp Gmail tool call.

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

CHECK YOUR STACK →