Get reverse DNS records for a range of IP addresses or CIDR.
AI agents call mass_reverse_dns to retrieve information from NetworksDB-MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs lookups and retrieves existing DNS records for IP address ranges. It is a read-only query operation with no side effects, data modification, code execution, or destructive capability. While it could be used for reconnaissance, the blast radius of misuse is limited to information disclosure, warranting a 'low' severity classification.
From the tool's definition Tool name 'mass_reverse_dns' and description 'Get reverse DNS records for a range of IP addresses or CIDR' indicate a query operation that retrieves DNS information without modifying or deleting data.
Risk signalsBulk/mass operation — affects multiple targets
Documented attack patterns abuse exactly the kind of access mass_reverse_dns gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and NetworksDB-MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for mass_reverse_dns:
{
"version": "1",
"default": "deny",
"tools": {
"mass_reverse_dns": {}
}
}mass_reverse_dns is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Get reverse DNS records for a range of IP addresses or CIDR. It is categorised as a Read tool in the NetworksDB-MCP MCP Server, which means it retrieves data without modifying state.
Register the NetworksDB- MCP server in PolicyLayer and add a rule for mass_reverse_dns: 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 NetworksDB-MCP. Nothing to install.
mass_reverse_dns 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 mass_reverse_dns 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 mass_reverse_dns. 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.
mass_reverse_dns is provided by the NetworksDB- MCP server (mordavid/networksdb-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from NetworksDB-MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
11 NetworksDB-MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.