AI agents call sublist3r_scan to retrieve information from Kali Security MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Sublist3r is a subdomain enumeration tool used for reconnaissance. It queries DNS records, search engines, and other sources to discover subdomains. This is a Read/information-gathering operation. However, on a penetration testing server alongside active attack tools, the enumeration results directly feed offensive workflows, raising the severity to medium despite the read-only nature of the tool itself.
From the tool's definition 子域名枚举 (subdomain enumeration) — passive/active reconnaissance that discovers subdomains; no modification or destruction of data
Documented attack patterns abuse exactly the kind of access sublist3r_scan 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 sublist3r_scan:
{
"version": "1",
"default": "deny",
"tools": {
"sublist3r_scan": {}
}
}sublist3r_scan is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
使用 Sublist3r 执行子域名枚举。. It is categorised as a Read tool in the Kali Security MCP MCP Server, which means it retrieves data without modifying state.
Register the Kali Security MCP server in PolicyLayer and add a rule for sublist3r_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 Kali Security MCP. Nothing to install.
sublist3r_scan is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the sublist3r_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 sublist3r_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.
sublist3r_scan 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.