AI agents invoke nmap_os_detection to trigger actions in Wireshark 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.
Nmap OS detection involves active network scanning by sending probe packets to remote hosts to fingerprint their operating system. This constitutes executing an external operation with real network effects. The tool name clearly references nmap, a well-known network scanner. OS detection scans can be considered intrusive or even hostile by target systems/networks.
From the tool's definition Tool name 'nmap_os_detection' implies running nmap for OS detection scanning against network targets
Documented attack patterns abuse exactly the kind of access nmap_os_detection gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Wireshark MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for nmap_os_detection:
{
"version": "1",
"default": "deny",
"tools": {
"nmap_os_detection": {
"limits": [
{
"counter": "nmap_os_detection_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}nmap_os_detection 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.
Free to start. No card required.
nmap_os_detection. It is categorised as a Execute tool in the Wireshark MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Wireshark MCP Server MCP server in PolicyLayer and add a rule for nmap_os_detection: 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 Wireshark MCP Server. Nothing to install.
nmap_os_detection 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 nmap_os_detection 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 nmap_os_detection. 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.
nmap_os_detection is provided by the Wireshark MCP Server MCP server (mixelpixx/wireshark-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Wireshark MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
19 Wireshark MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.