AI agents call vuln_search_severity 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.
This is a vulnerability lookup or database query tool that searches for existing vulnerability records filtered by severity. It performs read-only operations to retrieve data. While used in a penetration testing context (Kali Security MCP), the tool itself does not execute exploits, modify systems, delete data, or move money.
From the tool's definition Tool name 'vuln_search_severity' and description '按严重程度搜索漏洞' (search vulnerabilities by severity level) indicate a search/query operation that retrieves vulnerability information without modifying or executing anything.
Documented attack patterns abuse exactly the kind of access vuln_search_severity 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 vuln_search_severity:
{
"version": "1",
"default": "deny",
"tools": {
"vuln_search_severity": {}
}
}vuln_search_severity is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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按严重程度搜索漏洞. 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 vuln_search_severity: 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.
vuln_search_severity 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 vuln_search_severity 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 vuln_search_severity. 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.
vuln_search_severity 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.