AI agents call pdns_for_hostname to retrieve information from SeldomMaster without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a DNS lookup/query operation, which is a read-only retrieval of passive DNS data. No data is created, modified, deleted, or destroyed. Severity is medium rather than low because DNS reconnaissance can expose network infrastructure details useful for threat mapping, but the tool itself has no side effects beyond information retrieval.
From the tool's definition pdns_for_hostname - queries passive DNS records for a given hostname, retrieving historical DNS resolution data without modifying or deleting anything
Documented attack patterns abuse exactly the kind of access pdns_for_hostname gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and SeldomMaster, and nothing reaches the server without passing your rules. This is the rule we recommend for pdns_for_hostname:
{
"version": "1",
"default": "deny",
"tools": {
"pdns_for_hostname": {}
}
}pdns_for_hostname is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Name: pdns_for_hostname. It is categorised as a Read tool in the SeldomMaster MCP Server, which means it retrieves data without modifying state.
Register the SeldomMaster MCP server in PolicyLayer and add a rule for pdns_for_hostname: 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 SeldomMaster. Nothing to install.
pdns_for_hostname 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 pdns_for_hostname 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 pdns_for_hostname. 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.
pdns_for_hostname is provided by the SeldomMaster MCP server (paralax/seldommonster). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from SeldomMaster, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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52 SeldomMaster tools catalogued and risk-classified — across an index of 43,000+ MCP servers.