portScan · Linux Network Scanner MCP Server MCP

WHAT IT DOES

What portScan does on Linux Network Scanner MCP Server

AI agents invoke portScan to trigger actions in Linux Network Scanner MCP Server. 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 portScan needs a policy

Port scanning actively probes remote hosts and network infrastructure, triggering external operations whose effects depend on arguments. The server context (network security scanning, vulnerability assessment) and sibling tools (exploitScan, ftpBruteForce) indicate this is an active network reconnaissance tool. Misuse could enable unauthorized network mapping and facilitate further attacks.

From the tool's definition Tool name 'portScan' on a server explicitly described as using nmap for 'port scanning, service identification, OS detection' alongside sibling tools like 'exploitScan', 'ftpBruteForce', and 'directCmd'

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

portScan Rate-limited

portScan 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": {
    "portScan": {
      "limits": [
        {
          "counter": "portscan_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 Linux Network Scanner MCP Server, so you can run agents against it safely.

FAQ

Questions about portScan

What does the portScan tool do? +

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

How do I enforce a policy on portScan? +

Register the Linux Network Scanner MCP Server MCP server in PolicyLayer and add a rule for portScan: 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 Linux Network Scanner MCP Server. Nothing to install.

What risk level is portScan? +

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

Can I rate-limit portScan? +

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

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

portScan is provided by the Linux Network Scanner MCP Server MCP server (nibesh0/netsecmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.