tdarr_admin_register · Tdarr MCP: Risk & Policy

WHAT IT DOES

What tdarr_admin_register does on Tdarr

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

WHY IT NEEDS A POLICY

Why tdarr_admin_register needs a policy

This tool creates a new user account, which is a reversible write operation that modifies the user database. While not destructive (accounts can be deleted/modified), it has high severity because an AI agent could spam user registrations, create unauthorized accounts, or escalate privileges through account creation. The 'admin' prefix suggests elevated permissions are involved.

From the tool's definition Tool name is 'tdarr_admin_register' and description states it 'Admin register a new user', which creates a new user account in the system.

Risk signalsAdmin/system-level operation

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

tdarr_admin_register Rate-limited

tdarr_admin_register 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": {
    "tdarr_admin_register": {
      "limits": [
        {
          "counter": "tdarr_admin_register_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 Tdarr, so you can run agents against it safely.

FAQ

Questions about tdarr_admin_register

What does the tdarr_admin_register tool do? +

Admin register a new user. It is categorised as a Write tool in the Tdarr MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on tdarr_admin_register? +

Register the Tdarr MCP server in PolicyLayer and add a rule for tdarr_admin_register: 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 Tdarr. Nothing to install.

What risk level is tdarr_admin_register? +

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

Can I rate-limit tdarr_admin_register? +

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

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

tdarr_admin_register is provided by the Tdarr MCP server (maximeallanic/tdarr-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.