arr_execute

THE RISK

High Risk

Why arr_execute needs a policy

This tool triggers external operations on media management systems. While not inherently destructive, it can modify system state (e.g., trigger downloads, add content, change settings) and the natural language interface means an AI could inadvertently cause unintended side effects.

From the tool's definition Tool name 'arr_execute' combined with description 'Execute arr suite operations using natural language' indicates the tool runs operations on media automation services (Sonarr, Radarr, Prowlarr, Bazarr, Overseerr, Plex).

Documented attack patterns abuse exactly the kind of access arr_execute gives an agent:

POLICY

How to control arr_execute

PolicyLayer is an MCP gateway — it sits between your AI agents and Arr Suite MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for arr_execute:

policy.json

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

arr_execute 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.

Create a free account and register Arr Suite MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Arr Suite MCP Server tools

Execute bazarr_download_subtitle Download a subtitle Execute plex_scan_library Scan a Plex library for new content Execute prowlarr_sync_apps Sync indexers to all connected applications Write overseerr_request Request a movie or TV show Write plex_mark_watched Mark media as watched Write radarr_add_movie Add a new movie to Radarr Write sonarr_add_series Add a new TV series to Sonarr Read arr_explain_intent Explain how a natural language query would be interpreted

All 25 Arr Suite MCP Server tools →

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Go deeper

High-risk tools in Arr Suite MCP Server → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about arr_execute

What does the arr_execute tool do? +

Execute arr suite operations using natural language. It is categorised as a Execute tool in the Arr Suite MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on arr_execute? +

Register the Arr Suite MCP Server MCP server in PolicyLayer and add a rule for arr_execute: 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 Arr Suite MCP Server. Nothing to install.

What risk level is arr_execute? +

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

Can I rate-limit arr_execute? +

Yes. Add a rate_limit block to the arr_execute 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_execute completely? +

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

arr_execute is provided by the Arr Suite MCP Server MCP server (shaktech786/arr-suite-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Arr Suite MCP Server tool call.

Start from Arr Suite MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →