romm_favorite · Mcp Romm MCP: Risk & Policy

WHAT IT DOES

What romm_favorite does on Mcp Romm

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

WHY IT NEEDS A POLICY

Why romm_favorite needs a policy

This tool modifies a user's favorites list by adding or removing entries. It is a reversible write operation (toggling favorite status) with minimal blast radius — no data is deleted, no code is executed, and no financial transactions occur.

From the tool's definition Add or remove a ROM from your Favorites

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

romm_favorite Rate-limited

romm_favorite 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": {
    "romm_favorite": {
      "limits": [
        {
          "counter": "romm_favorite_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 Mcp Romm, so you can run agents against it safely.

FAQ

Questions about romm_favorite

What does the romm_favorite tool do? +

Add or remove a ROM from your Favorites. It is categorised as a Write tool in the Mcp Romm MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on romm_favorite? +

Register the Mcp Romm MCP server in PolicyLayer and add a rule for romm_favorite: 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 Mcp Romm. Nothing to install.

What risk level is romm_favorite? +

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

Can I rate-limit romm_favorite? +

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

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

romm_favorite is provided by the Mcp Romm MCP server (lodordev/mcp-romm). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.