// MCP TOOL REFERENCE

pt_media_prune

Trigger pruning of remote-cached video files older than N days. PeerTube runs this on a scheduled job; this forces an immediate pass. Admin-only. Rate-limited: 2/hour.

ServerCrow
CategoryDestructive

How to control pt_media_prune ↓

WHAT IT DOES

What pt_media_prune does on Crow

AI agents call pt_media_prune to permanently remove resources in Crow — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.

THE RISK

Critical Risk

Why pt_media_prune needs a policy

Pruning cached video files is an irreversible deletion operation — once remote-cached files are purged, they cannot be recovered locally. The tool forces an immediate deletion pass bypassing the normal scheduled job, and is admin-only with rate limiting, indicating significant blast radius. This is clearly Destructive in nature.

From the tool's definition Trigger pruning of remote-cached video files older than N days... forces an immediate pass

Risk signalsAdmin/system-level operation

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

POLICY

How to control pt_media_prune

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

policy.json

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

pt_media_prune 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 Crow — 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 →

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EXPLORE

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Go deeper

Critical-risk tools in Crow → 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 pt_media_prune

What does the pt_media_prune tool do? +

Trigger pruning of remote-cached video files older than N days. PeerTube runs this on a scheduled job; this forces an immediate pass. Admin-only. Rate-limited: 2/hour. It is categorised as a Destructive tool in the Crow 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 pt_media_prune? +

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

What risk level is pt_media_prune? +

pt_media_prune 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 pt_media_prune? +

Yes. Add a rate_limit block to the pt_media_prune 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 pt_media_prune completely? +

Set action: deny in the PolicyLayer policy for pt_media_prune. 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 pt_media_prune? +

pt_media_prune is provided by the Crow MCP server (kh0pper/crow). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Crow tool call.

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

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576 Crow tools catalogued and risk-classified — across an index of 43,000+ MCP servers.