Delete an email message (moves to trash by default)
AI agents call delete_message to permanently remove resources in Mail Cal Drive — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Email messages often contain critical business communications, sensitive information, or compliance-required records. Deleting messages—especially in bulk or by mistake via agent misuse—could result in loss of audit trails, regulatory violations, or destruction of evidence.
From the tool's definition Tool name is 'delete_message' and description states 'Delete an email message (moves to trash by default)'.
Attacks that exploit this kind of access
Delete an email message (moves to trash by default). It is categorised as a Destructive tool in the Mail Cal Drive MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Mail Cal Drive MCP server in PolicyLayer and add a rule for delete_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 Mail Cal Drive. Nothing to install.
delete_message 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_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.
Set action: deny in the PolicyLayer policy for delete_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.
delete_message is provided by the Mail Cal Drive MCP server (rumbitopi/mail-cal-drive-mcp). 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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