Low Risk

arr_list_services

List all configured and available arr services

How to control arr_list_services ↓

What arr_list_services does on Arr Suite MCP Server

AI agents call arr_list_services to retrieve information from Arr Suite MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Low Risk

Why arr_list_services needs a policy

This tool performs a simple enumeration/listing operation that queries the current state of configured services. It does not create, modify, delete, or execute any actions—it only reads and returns information. The blast radius of misuse is minimal: an agent could learn what services are available, but cannot manipulate them with this tool alone. Therefore, it is classified as Read with low severity.

From the tool's definition Tool name 'arr_list_services' and description 'List all configured and available arr services' indicate retrieval of configuration data without modification or side effects.

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

How to control arr_list_services

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_list_services:

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "arr_list_services": {}
  }
}

arr_list_services is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

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

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Questions about arr_list_services

What does the arr_list_services tool do? +

List all configured and available arr services. It is categorised as a Read tool in the Arr Suite MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on arr_list_services? +

Register the Arr Suite MCP Server MCP server in PolicyLayer and add a rule for arr_list_services: 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_list_services? +

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

Can I rate-limit arr_list_services? +

Yes. Add a rate_limit block to the arr_list_services 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_list_services completely? +

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

arr_list_services 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.

Free to start. No card required.

25 Arr Suite MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.

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