Delete an IMAP folder and all its contents. Special folders cannot be deleted. Requires TREKMAIL_ALLOW_DESTRUCTIVE=true.
AI agents call delete_folder 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.
This tool irreversibly deletes data (email folders and all contained messages) without possibility of recovery through normal means. The deletion cannot be undone through the tool itself. While the blast radius is limited to a single folder (not organizational data), the permanent loss of email data constitutes a high-severity destructive action.
From the tool's definition Tool description explicitly states 'Delete an IMAP folder and all its contents' and requires TREKMAIL_ALLOW_DESTRUCTIVE=true environment variable, indicating destructive operations are flagged as requiring explicit permission.
Attacks that exploit this kind of access
Delete an IMAP folder and all its contents. Special folders cannot be deleted. Requires TREKMAIL_ALLOW_DESTRUCTIVE=true. 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_folder: 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_folder 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_folder 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_folder. 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_folder 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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