Identify web technologies.
AI agents call whatweb_scan to retrieve information from Kali MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
whatweb performs passive reconnaissance by analyzing web server responses to identify technologies in use (e.g., web servers, CMS platforms, JavaScript libraries). This is a Read operation: it retrieves and analyzes data with no side effects on the target. Severity is medium because reconnaissance data can enable follow-on attacks, but the tool itself causes no direct harm.
From the tool's definition Tool name 'whatweb_scan' and description 'Identify web technologies' indicate reconnaissance and information gathering.
Attacks that exploit this kind of access
Identify web technologies. It is categorised as a Read tool in the Kali MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Kali MCP Server MCP server in PolicyLayer and add a rule for whatweb_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 MCP Server. Nothing to install.
whatweb_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 whatweb_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 whatweb_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.
whatweb_scan is provided by the Kali MCP Server MCP server (jesseeikeland/kali-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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