Delete a user-created Gmail label. System labels (INBOX, SENT, etc.) cannot be deleted.
AI agents call delete_label to permanently remove resources in Gmail MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool permanently removes user-created Gmail labels, which is an irreversible action. While the blast radius is somewhat limited compared to deleting emails themselves, labels often contain important organizational metadata and their deletion cannot be automatically undone.
From the tool's definition Tool name is 'delete_label' and description states 'Delete a user-created Gmail label.' The verb 'Delete' combined with the irreversible nature of removing a label (which cannot be undone without manual recreation) places this in the Destructive category.
Attacks that exploit this kind of access
Delete a user-created Gmail label. System labels (INBOX, SENT, etc.) cannot be deleted. It is categorised as a Destructive tool in the Gmail MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Gmail MCP Server MCP server in PolicyLayer and add a rule for delete_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.
delete_label is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the delete_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.
Set action: deny in the PolicyLayer policy for delete_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.
delete_label is provided by the Gmail MCP Server MCP server (neutral-stage/gmail-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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