AI agents invoke ncrack_attack to trigger actions in Kali Security MCP. 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.
Ncrack is a high-speed network authentication cracker. This tool runs active credential brute-force attacks against remote network services. It executes external tool operations whose effects depend on arguments (target hosts, credentials). The server context ('penetration testing') and tool name suffix '_attack' confirm offensive execution. Misuse could compromise remote systems, making severity critical.
From the tool's definition ncrack_attack — 'Ncrack 执行网络服务凭据验证' (execute network service credential verification/brute-force using Ncrack)
Documented attack patterns abuse exactly the kind of access ncrack_attack gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Kali Security MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for ncrack_attack:
{
"version": "1",
"default": "deny",
"tools": {
"ncrack_attack": {
"limits": [
{
"counter": "ncrack_attack_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}ncrack_attack 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.
使用 Ncrack 执行网络服务凭据验证。. It is categorised as a Execute tool in the Kali Security MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Kali Security MCP server in PolicyLayer and add a rule for ncrack_attack: 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 Kali Security MCP. Nothing to install.
ncrack_attack 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 ncrack_attack 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 ncrack_attack. 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.
ncrack_attack is provided by the Kali Security MCP server (seac-25/kali-security-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 249 Kali Security MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
249 Kali Security MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.