Delete a single message from the inbox
AI agents call mail_delete_message to permanently remove resources in Mailgent MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Deleting an email message is a destructive action that cannot be undone. An AI agent with access to this tool could permanently remove important messages, communications, or evidence without recovery. The high severity reflects the potential for significant data loss and the irreversible nature of the operation. Confidence is very high because the intent is explicitly stated in both the name and description.
From the tool's definition Tool name explicitly contains 'delete' and description states 'Delete a single message from the inbox' — this is an irreversible deletion operation on user data.
Attacks that exploit this kind of access
Delete a single message from the inbox. It is categorised as a Destructive tool in the Mailgent MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Mailgent MCP Server MCP server in PolicyLayer and add a rule for mail_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 Mailgent MCP Server. Nothing to install.
mail_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 mail_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 mail_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.
mail_delete_message is provided by the Mailgent MCP Server MCP server (loomal-ai/loomal-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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