Autonomous System (BGP) intelligence by AS number (e.g. AS3333). Returns the AS holder/operator, IANA/RIR allocation block, whether it is announced, and live routing status: announced IPv4/IPv6 prefixes + address counts, RIS peer visibility, and observed neighbour count. RIPEstat (RIPE NCC), free...
AI agents call net.asn 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 is a pure data retrieval tool that queries public BGP and routing intelligence databases. It gathers information about network ownership and routing topology but performs no side effects, does not execute code, does not modify data, and does not involve financial transactions. The 'live' aspect refers to current state observation, not active manipulation.
From the tool's definition Tool description explicitly states it 'Returns' data about autonomous systems: 'AS holder/operator, IANA/RIR allocation block, whether it is announced, and live routing status'. Uses 'RIPEstat (RIPE NCC), free' as data source.
Attacks that exploit this kind of access
Autonomous System (BGP) intelligence by AS number (e.g. AS3333). Returns the AS holder/operator, IANA/RIR allocation block, whether it is announced, and live routing status: announced IPv4/IPv6 prefixes + address counts, RIS peer visibility, and observed neighbour count. RIPEstat (RIPE NCC), free. Distinct from geo.ip and dns/whois — who owns and routes an AS, observed live. 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.asn: 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.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 net.asn 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.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.
net.asn 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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