disk_wipe

THE RISK

Critical Risk

Why disk_wipe needs a policy

This tool irreversibly deletes all data on a disk and cannot be undone. It matches the Destructive category definition precisely. The critical severity reflects the complete data loss risk and maximum blast radius if invoked by an AI agent without proper safeguards. The description explicitly labels it as destructive.

From the tool's definition Tool name 'disk_wipe' combined with description stating 'Wipe a disk, destroying all data on it. This is a DESTRUCTIVE operation'

Risk signalsBulk/mass operation — affects multiple targets

Documented attack patterns abuse exactly the kind of access disk_wipe gives an agent:

POLICY

How to control disk_wipe

PolicyLayer is an MCP gateway — it sits between your AI agents and Truenas, and nothing reaches the server without passing your rules. This is the rule we recommend for disk_wipe:

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "disk_wipe"
  ]
}

disk_wipe disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

Create a free account and register Truenas — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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Destructive tools on other servers

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Go deeper

Critical-risk tools in Truenas → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about disk_wipe

What does the disk_wipe tool do? +

Wipe a disk, destroying all data on it. This is a DESTRUCTIVE operation — the. It is categorised as a Destructive tool in the Truenas MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on disk_wipe? +

Register the Truenas MCP server in PolicyLayer and add a rule for disk_wipe: 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. Nothing to install.

What risk level is disk_wipe? +

disk_wipe is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit disk_wipe? +

Yes. Add a rate_limit block to the disk_wipe 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.

How do I block disk_wipe completely? +

Set action: deny in the PolicyLayer policy for disk_wipe. 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.

What MCP server provides disk_wipe? +

disk_wipe is provided by the Truenas MCP server (spranab/truenas-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Truenas tool call.

Start from Truenas, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →