sonarr_set_path_mapping · Homelab MCP: Risk & Policy

WHAT IT DOES

What sonarr_set_path_mapping does on Homelab

AI agents use sonarr_set_path_mapping 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 sonarr_set_path_mapping needs a policy

This tool modifies Sonarr's path mapping configuration, which is a reversible change to application state. It does not execute arbitrary commands, delete data, or move funds. While misconfiguration could cause operational issues (incorrect media paths), the action itself is a standard Write operation that can be corrected.

From the tool's definition Tool name includes 'set' and description states 'Add or update', indicating creation or modification of configuration data (path mappings in Sonarr).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sonarr_set_path_mapping Rate-limited

sonarr_set_path_mapping 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": {
    "sonarr_set_path_mapping": {
      "limits": [
        {
          "counter": "sonarr_set_path_mapping_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 sonarr_set_path_mapping

What does the sonarr_set_path_mapping tool do? +

Add or update a remote path mapping in Sonarr. 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 sonarr_set_path_mapping? +

Register the Homelab MCP server in PolicyLayer and add a rule for sonarr_set_path_mapping: 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 sonarr_set_path_mapping? +

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

Can I rate-limit sonarr_set_path_mapping? +

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

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

sonarr_set_path_mapping 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.