AI agents call dns_lookup to retrieve information from Idig Dns without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a pure read operation that queries DNS infrastructure and returns information without creating, modifying, deleting, or executing anything. The blast radius of misuse is minimal—DNS queries are non-destructive, read-only operations that provide publicly available or user's own domain information.
From the tool's definition Tool performs 'Look up DNS records' with no modification capabilities. Queries various DNS record types (a, aaaa, ns, mx, txt, soa, caa, srv, cname, ds, tlsa, https, svcb, any, all) but only retrieves existing data.
Attacks that exploit this kind of access
Look up DNS records for a domain. Record types: a, aaaa, ns, mx, txt, soa, caa, srv, cname, ds, tlsa, https, svcb, any, all. It is categorised as a Read tool in the Idig Dns MCP Server, which means it retrieves data without modifying state.
Register the Idig Dns MCP server in PolicyLayer and add a rule for dns_lookup: 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 Idig Dns. Nothing to install.
dns_lookup 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 dns_lookup 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 dns_lookup. 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.
dns_lookup is provided by the Idig Dns MCP server (https://mcp.softricks.net/sse). 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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