AI agents call delete-message to permanently remove resources in Apple Mail — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Email deletion is an irreversible action that permanently removes data. Even a single message deletion cannot be undone through normal operations. Given the macOS Mail context and lack of recovery mechanisms typical in email clients, this warrants Destructive classification.
From the tool's definition Tool name 'delete-message' combined with server context showing email management capabilities. The 'delete' verb indicates irreversible data removal.
Documented attack patterns abuse exactly the kind of access delete-message gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Apple Mail, and nothing reaches the server without passing your rules. This is the rule we recommend for delete-message:
{
"version": "1",
"default": "deny",
"hide": [
"delete-message"
]
}delete-message disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.
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delete-message. It is categorised as a Destructive tool in the Apple Mail MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Apple Mail 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 Apple Mail. 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 Apple Mail MCP server (sweetrb/apple-mail-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 40 Apple Mail tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
40 Apple Mail tools catalogued and risk-classified — across an index of 42,500+ MCP servers.