romm_scan_library · Mcp Romm MCP: Risk & Policy

WHAT IT DOES

What romm_scan_library does on Mcp Romm

AI agents invoke romm_scan_library to trigger actions in Mcp Romm. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why romm_scan_library needs a policy

This tool triggers an active operation on the server (a library rescan), which is an external operation that initiates processing beyond simple data retrieval. It doesn't just read data — it causes the server to actively scan and potentially update its internal state, catalog, and metadata.

From the tool's definition "Trigger a library rescan to discover new ROMs and platforms"

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

romm_scan_library Rate-limited

romm_scan_library 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.

View as policy code

policy.json

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

RATE-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_scan_library

What does the romm_scan_library tool do? +

Trigger a library rescan to discover new ROMs and platforms. It is categorised as a Execute tool in the Mcp Romm MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on romm_scan_library? +

Register the Mcp Romm MCP server in PolicyLayer and add a rule for romm_scan_library: 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_scan_library? +

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

Can I rate-limit romm_scan_library? +

Yes. Add a rate_limit block to the romm_scan_library 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_scan_library completely? +

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

romm_scan_library 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.