Permanently remove an email alias from a mailbox. Mail sent to this address will no longer be delivered. This cannot be undone.
AI agents call delete_alias to permanently remove resources in TrekMail MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
The tool permanently deletes an email alias, which is an irreversible action. Once deleted, the alias ceases to function and cannot be restored through normal operations.
From the tool's definition Tool description explicitly states: 'Permanently remove', 'will no longer be delivered', and 'This cannot be undone.' These phrases directly indicate irreversible deletion of email alias functionality.
Attacks that exploit this kind of access
Permanently remove an email alias from a mailbox. Mail sent to this address will no longer be delivered. This cannot be undone. It is categorised as a Destructive tool in the TrekMail MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the TrekMail MCP Server MCP server in PolicyLayer and add a rule for delete_alias: 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 TrekMail MCP Server. Nothing to install.
delete_alias 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_alias 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_alias. 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_alias is provided by the TrekMail MCP Server MCP server (trekmail/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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