radarr_set_cf_score · Homelab MCP: Risk & Policy

WHAT IT DOES

What radarr_set_cf_score does on Homelab

AI agents use radarr_set_cf_score to create or update resources in Homelab — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Homelab environment.

WHY IT NEEDS A POLICY

Why radarr_set_cf_score needs a policy

This tool creates or modifies data reversibly by adjusting quality profile settings in Radarr. It does not delete data (Destructive), execute arbitrary code (Execute), or move money (Financial). The blast radius is medium because misconfiguration could affect media download behavior across the homelab, but changes are reversible through reconfiguration.

From the tool's definition Tool name contains 'set' and description states 'Set the score of a custom format in a Radarr quality profile' — this modifies configuration data in the Radarr media management system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

radarr_set_cf_score Rate-limited

radarr_set_cf_score stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "radarr_set_cf_score": {
      "limits": [
        {
          "counter": "radarr_set_cf_score_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about radarr_set_cf_score

What does the radarr_set_cf_score tool do? +

Set the score of a custom format in a Radarr quality profile. It is categorised as a Write tool in the Homelab MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on radarr_set_cf_score? +

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

What risk level is radarr_set_cf_score? +

radarr_set_cf_score is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit radarr_set_cf_score? +

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

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

radarr_set_cf_score is provided by the Homelab MCP server (nainounen/homelab-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.