Delete a chat folder.
AI agents call delete_folder to permanently remove resources in Telegram — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool permanently removes a chat folder without reversibility. While the underlying messages may not be deleted, the folder organization and any metadata associated with it are irreversibly destroyed. This is worse than Write (reversible modifications) but may be slightly less severe than deleting actual messages, as the blast radius is limited to folder structure rather than message content itself.
From the tool's definition Tool name is 'delete_folder' and description states 'Delete a chat folder.' The verb 'delete' combined with irreversible removal of a chat folder structure (which may contain multiple message references and organizational metadata) qualifies as destructive.
Attacks that exploit this kind of access
Delete a chat folder. It is categorised as a Destructive tool in the Telegram MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Telegram 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 Telegram. 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 Telegram MCP server (vovavindar/telegram-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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