asnlookup
AI agents call asnlookup to retrieve information from IR Toolshed MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
ASN lookups are informational network queries that retrieve routing and ownership data from public databases. They do not modify, execute code, or cause side effects. The tool fits the Read category as it retrieves data without side effects. Severity is low because ASN lookups are queries against publicly available network registry information with no destructive or sensitive operational impact.
From the tool's definition Tool name 'asnlookup' indicates ASN (Autonomous System Number) lookup functionality. The server description explicitly states it provides 'ASN lookups' as part of 'network analysis tools for security professionals,' alongside other read-only operations like…
Attacks that exploit this kind of access
asnlookup. It is categorised as a Read tool in the IR Toolshed MCP Server MCP Server, which means it retrieves data without modifying state.
Register the IR Toolshed MCP Server MCP server in PolicyLayer and add a rule for asnlookup: 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 IR Toolshed MCP Server. Nothing to install.
asnlookup 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 asnlookup 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 asnlookup. 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.
asnlookup is provided by the IR Toolshed MCP Server MCP server (rossja/irtoolshed-mcp-server). 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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