Get just the hostname for an IP address.
AI agents call get_ip_hostname to retrieve information from IPInfo MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves hostname information associated with an IP address. It performs a lookup query without modifying, executing code, deleting data, or committing financial transactions. The action is read-only and returns informational data. The low severity reflects minimal blast radius—an AI agent misusing this tool would only retrieve publicly available IP-to-hostname mappings, which poses negligible risk.
From the tool's definition Tool name is 'get_ip_hostname' and description states 'Get just the hostname for an IP address.' The verb 'get' and context of retrieving hostname data indicate a query operation with no side effects.
Attacks that exploit this kind of access
Get just the hostname for an IP address. It is categorised as a Read tool in the IPInfo MCP Server MCP Server, which means it retrieves data without modifying state.
Register the IPInfo MCP Server MCP server in PolicyLayer and add a rule for get_ip_hostname: 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 IPInfo MCP Server. Nothing to install.
get_ip_hostname 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 get_ip_hostname 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 get_ip_hostname. 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.
get_ip_hostname is provided by the IPInfo MCP Server MCP server (nimblebraininc/mcp-ipinfo). 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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