Return the Nth usable IP address in a subnet.
AI agents call get_nth_usable_ip to retrieve information from Subnet Calculator without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves information (the Nth usable IP address) from a subnet based on calculation/lookup logic. It performs no write, execution, deletion, or financial operations. It is informational only, consistent with network planning tools that engineers use to validate addressing schemes without modifying any actual network configuration or data.
From the tool's definition Tool description states 'Return the Nth usable IP address in a subnet' — a pure query/retrieval operation with no side effects. The verb 'Return' indicates data retrieval only.
Attacks that exploit this kind of access
Return the Nth usable IP address in a subnet. It is categorised as a Read tool in the Subnet Calculator MCP Server, which means it retrieves data without modifying state.
Register the Subnet Calculator MCP server in PolicyLayer and add a rule for get_nth_usable_ip: 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 Subnet Calculator. Nothing to install.
get_nth_usable_ip 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_nth_usable_ip 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_nth_usable_ip. 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_nth_usable_ip is provided by the Subnet Calculator MCP server (sanjayshreeyans/subnet-calculator-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.
Teams ship this data inside their own products. See what a licence covers →