Perform reverse DNS lookups to find hostnames associated with IP addresses. Supports batch lookups of multiple IP addresses in a single query. Returns all known hostnames for each IP address, with clear indication when no hostnames are found.
AI agents call reverse_dns_lookup to retrieve information from Mcp Shodan without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Reverse DNS lookup is a read-only query operation that retrieves publicly available DNS information. It does not modify, create, delete, or execute anything. While the Shodan context suggests this could be used for reconnaissance, the tool itself has no side effects and returns only informational data. The blast radius of misuse is limited to information gathering.
From the tool's definition Tool performs reverse DNS lookups to find hostnames associated with IP addresses. The description explicitly states it 'Perform[s] reverse DNS lookups' and 'Returns all known hostnames' — purely retrieval operations with no data modification, deletion, or…
Attacks that exploit this kind of access
Perform reverse DNS lookups to find hostnames associated with IP addresses. Supports batch lookups of multiple IP addresses in a single query. Returns all known hostnames for each IP address, with clear indication when no hostnames are found. It is categorised as a Read tool in the Mcp Shodan MCP Server, which means it retrieves data without modifying state.
Register the Mcp Shodan MCP server in PolicyLayer and add a rule for reverse_dns_lookup: 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 Mcp Shodan. Nothing to install.
reverse_dns_lookup 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 reverse_dns_lookup 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 reverse_dns_lookup. 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.
reverse_dns_lookup is provided by the Mcp Shodan MCP server (w0h1v/mcp-shodan). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.