Delete a snapshot. Requires confirm=True. Snapshot format: dataset@name.
AI agents call delete_snapshot to permanently remove resources in Truenas Ws — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Snapshot deletion is irreversible and destroys data backups. While the tool requires confirm=True as a safeguard, the core operation permanently removes snapshots that cannot be recovered. This falls squarely into the Destructive category.
From the tool's definition Tool name is "delete_snapshot" and description explicitly states "Delete a snapshot". The word "Delete" and the irreversible nature of snapshot deletion clearly indicate a destructive operation.
Attacks that exploit this kind of access
Delete a snapshot. Requires confirm=True. Snapshot format: dataset@name. It is categorised as a Destructive tool in the Truenas Ws MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Truenas Ws MCP server in PolicyLayer and add a rule for delete_snapshot: 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 Truenas Ws. Nothing to install.
delete_snapshot 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_snapshot 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_snapshot. 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_snapshot is provided by the Truenas Ws MCP server (thoriphes/truenas-ws-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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