AI agents invoke quick-scan to trigger actions in Nmap. 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.
The tool is part of an Nmap MCP server that executes network scans against external targets. Even though the tool description is empty, the server context and sibling tools (scan-ports, scan-vulnerabilities, discover-hosts, detect-services, detect-os) strongly indicate this tool runs network reconnaissance operations.
From the tool's definition Tool name 'quick-scan' on a server described as wrapping Nmap for 'automated network security assessments, including port scanning, host discovery, service detection, OS fingerprinting, and vulnerability scanning'
Documented attack patterns abuse exactly the kind of access quick-scan gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Nmap, and nothing reaches the server without passing your rules. This is the rule we recommend for quick-scan:
{
"version": "1",
"default": "deny",
"tools": {
"quick-scan": {
"limits": [
{
"counter": "quick-scan_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}quick-scan 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.
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quick-scan. It is categorised as a Execute tool in the Nmap MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Nmap MCP server in PolicyLayer and add a rule for quick-scan: 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 Nmap. Nothing to install.
quick-scan is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the quick-scan 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.
Set action: deny in the PolicyLayer policy for quick-scan. 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.
quick-scan is provided by the Nmap MCP server (vorota-ai/nmap-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Nmap, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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6 Nmap tools catalogued and risk-classified — across an index of 43,000+ MCP servers.