AI agents call net.ip-resolve to retrieve information from Mcp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a lookup/query operation on an IP address, returning metadata such as ASN, organization, ISP, and geolocation. It is purely read/fetch with no side effects. Severity is low as it only retrieves publicly available network information, though it is worth noting this server uses pay-per-call billing in USDC which could have minor financial implications per invocation.
From the tool's definition Resolve an IP to its ASN, holder org, RIR allocation block, ISP, and geo in one call.
Attacks that exploit this kind of access
Resolve an IP to its ASN, holder org, RIR allocation block, ISP, and geo in one call. It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.
Register the MCP server in PolicyLayer and add a rule for net.ip-resolve: 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. Nothing to install.
net.ip-resolve 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 net.ip-resolve 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 net.ip-resolve. 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.
net.ip-resolve is provided by the MCP server (@2sio/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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