Perform a WHOIS lookup to get the public profile, SKILL.md, and capabilities of an agent identity.
AI agents call lookup_whois to retrieve information from Headless Domains MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
WHOIS lookup is a standard query operation that retrieves publicly available information about domain registrations. It does not modify data, execute code, delete resources, or trigger financial transactions. The operation is read-only and has minimal security blast radius since it accesses public information. Severity is low because misuse would only expose information already meant to be public.
From the tool's definition Tool name 'lookup_whois' and description explicitly states 'Perform a WHOIS lookup to get the public profile' — a retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
Perform a WHOIS lookup to get the public profile, SKILL.md, and capabilities of an agent identity. It is categorised as a Read tool in the Headless Domains MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Headless Domains MCP Server MCP server in PolicyLayer and add a rule for lookup_whois: 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 Headless Domains MCP Server. Nothing to install.
lookup_whois 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 lookup_whois 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 lookup_whois. 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.
lookup_whois is provided by the Headless Domains MCP Server MCP server (shadstoneofficial/headlessdomains-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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