update_series · Sonarr MCP Server MCP: Risk & Policy

WHAT IT DOES

What update_series does on Sonarr MCP Server

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

WHY IT NEEDS A POLICY

Why update_series needs a policy

update_series modifies TV series metadata and configuration settings, which classifies it as Write (reversible creation/modification). It does not execute code, delete data, or move money. The severity is medium because misconfigured quality profiles or monitoring settings could cause unintended downloads or storage usage, but changes are reversible via another update call.

From the tool's definition Tool description states it 'Update[s] series settings' which is a reversible modification of configuration data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_series Rate-limited

update_series 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": {
    "update_series": {
      "limits": [
        {
          "counter": "update_series_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 Sonarr MCP Server, so you can run agents against it safely.

FAQ

Questions about update_series

What does the update_series tool do? +

Update series settings (quality profile, monitoring, search). It is categorised as a Write tool in the Sonarr MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on update_series? +

Register the Sonarr MCP Server MCP server in PolicyLayer and add a rule for update_series: 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 Sonarr MCP Server. Nothing to install.

What risk level is update_series? +

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

Can I rate-limit update_series? +

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

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

update_series is provided by the Sonarr MCP Server MCP server (micky-devs/sonarr-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.