arr_stack · Plex MCP: Risk & Policy

WHAT IT DOES

What arr_stack does on PlexMCP

AI agents call arr_stack as a supporting operation in PlexMCP workflows.

WHY IT NEEDS A POLICY

Why arr_stack needs a policy

The description is empty and the name 'arr_stack' is ambiguous. It could refer to integration with *arr applications (Sonarr, Radarr, etc.) for media management, but without any description, the exact action cannot be determined. Lowering confidence significantly due to lack of information.

From the tool's definition Tool name 'arr_stack' and empty description provide no clear indication of what the tool does.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

arr_stack Rate-limited

arr_stack gets a rate cap, and everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "arr_stack": {
      "limits": [
        {
          "counter": "arr_stack_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

SET A RULE FOR THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about arr_stack

What does the arr_stack tool do? +

arr_stack. It is categorised as a Other tool in the PlexMCP MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on arr_stack? +

Register the Plex MCP server in PolicyLayer and add a rule for arr_stack: 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 PlexMCP. Nothing to install.

What risk level is arr_stack? +

arr_stack is a Other tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit arr_stack? +

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

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

arr_stack is provided by the Plex MCP server (sandraschi/plexmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.