Decision policy: call lookup_asn once per ASN/IP target with required include values decided up front. Hard rule: do not call lookup_asn a second time for the same target in the same answer unless the first call failed or required data is truly missing. If the first response already contains a s...
Part of the Ipgeolocation Io MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents call lookup_asn to retrieve information from Ipgeolocation Io without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though lookup_asn only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
tools:
lookup_asn:
rules:
- action: allowSee the full Ipgeolocation Io policy for all 16 tools.
Agents calling read-class tools like lookup_asn have been implicated in these attack patterns. Read the full case and prevention policy for each:
Other tools in the Read risk category across the catalogue. The same policy patterns (rate-limit, allow) apply to each.
Decision policy: call lookup_asn once per ASN/IP target with required include values decided up front. Hard rule: do not call lookup_asn a second time for the same target in the same answer unless the first call failed or required data is truly missing. If the first response already contains a superset of needed data, extract the requested subset locally and do not call lookup_asn again just to trim output. Detailed ASN lookup via GET /v3/asn. Paid only. Cost: 1 credit. Query by AS number or IP. Returns core ASN details and can include peers, downstreams, upstreams, routes, and WHOIS. Use lookup_ip for basic ASN data. Use this tool only when you need extended ASN datasets. Tool selection rule: if this tool is used, call it once per ASN/IP target and include set, then post-process locally. Do not re-call lookup_asn for the same target only to change fields/excludes or output shape.. It is categorised as a Read tool in the Ipgeolocation Io MCP Server, which means it retrieves data without modifying state.
Add a rule in your Intercept YAML policy under the tools section for lookup_asn. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Ipgeolocation Io MCP server.
lookup_asn 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_asn rule in your Intercept 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 Intercept policy for lookup_asn. 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_asn is provided by the Ipgeolocation Io MCP server (ipgeolocation-io-mcp). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Open source. One binary. Zero dependencies.
npx -y @policylayer/intercept