net_listen · Ruyipage MCP: Risk & Policy

WHAT IT DOES

What net_listen does on Ruyipage

AI agents invoke net_listen to trigger actions in Ruyipage. 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 net_listen needs a policy

The tool name 'net_listen' suggests network listening/monitoring activity, which in the context of a browser automation MCP server likely involves intercepting or monitoring network traffic/requests — an Execute-level operation. However, the empty description significantly lowers confidence. On a browser automation platform, this could also be a Read operation (passively monitoring network events).

From the tool's definition Tool name 'net_listen' on a browser automation server; description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

net_listen Rate-limited

net_listen 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": {
    "net_listen": {
      "limits": [
        {
          "counter": "net_listen_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 Ruyipage, so you can run agents against it safely.

FAQ

Questions about net_listen

What does the net_listen tool do? +

net_listen. It is categorised as a Execute tool in the Ruyipage MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on net_listen? +

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

What risk level is net_listen? +

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

Can I rate-limit net_listen? +

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

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

net_listen is provided by the Ruyipage MCP server (neverl805/ruyipage_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.