Get A records for a domain.
AI agents call get_a_records to retrieve information from Dnsdumpster without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves A records (IPv4 address mappings) for a domain, which is a standard DNS query operation. It has no side effects, does not modify data, and does not execute code or trigger external operations beyond the lookup itself.
From the tool's definition Tool name 'get_a_records' and description 'Get A records for a domain' indicate retrieval of DNS data with no modification or execution. The server's stated purpose is 'DNS reconnaissance', which is fundamentally a read/lookup operation.
Attacks that exploit this kind of access
Get A records for a domain. It is categorised as a Read tool in the Dnsdumpster MCP Server, which means it retrieves data without modifying state.
Register the Dnsdumpster MCP server in PolicyLayer and add a rule for get_a_records: 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 Dnsdumpster. Nothing to install.
get_a_records 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_a_records 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_a_records. 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_a_records is provided by the Dnsdumpster MCP server (maxweeden/mcp-dnsdumpster). 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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