tdarr_cancel_worker_item · Tdarr MCP: Risk & Policy

WHAT IT DOES

What tdarr_cancel_worker_item does on Tdarr

AI agents invoke tdarr_cancel_worker_item to trigger actions in Tdarr. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why tdarr_cancel_worker_item needs a policy

This tool terminates/cancels an active transcoding job on a worker node. It triggers an external operation (stopping a running process) whose effects depend on which worker item is targeted. While it stops an operation rather than creating/modifying data permanently, cancelling a running transcode job is an active execution-side effect.

From the tool's definition Cancel a running worker item on a specific node

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

tdarr_cancel_worker_item Rate-limited

tdarr_cancel_worker_item stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "tdarr_cancel_worker_item": {
      "limits": [
        {
          "counter": "tdarr_cancel_worker_item_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Tdarr, so you can run agents against it safely.

FAQ

Questions about tdarr_cancel_worker_item

What does the tdarr_cancel_worker_item tool do? +

Cancel a running worker item on a specific node. It is categorised as a Execute tool in the Tdarr MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on tdarr_cancel_worker_item? +

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

What risk level is tdarr_cancel_worker_item? +

tdarr_cancel_worker_item is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit tdarr_cancel_worker_item? +

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

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

tdarr_cancel_worker_item is provided by the Tdarr MCP server (maximeallanic/tdarr-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.