Delete an email allow/block rule by its ID
AI agents call mail_delete_rule 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.
Deletion of email rules is an irreversible operation that cannot be undone. Once a rule is deleted, the filtering configuration is lost and must be manually recreated. While not directly destructive to email data itself, it permanently removes security or organizational infrastructure. This qualifies as Destructive rather than Write because the operation cannot be reversed through the tool's normal operations.
From the tool's definition Tool name contains 'delete' and description states 'Delete an email allow/block rule by its ID'. The action irreversibly removes a configured email filtering rule.
Attacks that exploit this kind of access
Delete an email allow/block rule by its ID. 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_rule: 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_rule 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_rule 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_rule. 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_rule 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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