This record as markdown: /tools/gethosthewalrus-proxmox-mcp/delete-vm-snapshot.md
What delete_vm_snapshot does on Proxmox MCP Server
AI agents call delete_vm_snapshot to permanently remove resources in Proxmox MCP Server, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Why delete_vm_snapshot is rated Critical
Snapshot deletion is a destructive action that permanently removes backup/recovery points and cannot be undone. While the blast radius is limited to a single VM's snapshot (not the entire VM), the loss of a snapshot prevents recovery to a prior state, which is a critical operational impact. This is more severe than Write (reversible modification) but less than critical since the VM itself remains intact.
From the tool's definition Tool name 'delete_vm_snapshot' explicitly performs a deletion operation. The description 'Delete a VM snapshot' confirms irreversible removal of snapshot data.
Attacks that exploit this kind of access
The rule that runs delete_vm_snapshot safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Proxmox MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For delete_vm_snapshot, this is the rule to start with:
delete_vm_snapshot is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.
The button opens the PolicyLayer dashboard: create your workspace, connect Proxmox MCP Server, apply this rule, and every delete_vm_snapshot call is checked against it from then on.
Questions about delete_vm_snapshot
Delete a VM snapshot. It is categorised as a Destructive tool in the Proxmox MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Proxmox MCP Server MCP server in PolicyLayer and add a rule for delete_vm_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 Proxmox MCP Server. Nothing to install.
delete_vm_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_vm_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_vm_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_vm_snapshot is provided by the Proxmox MCP Server MCP server (gethosthewalrus/proxmox-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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