dns

THE RISK

Low Risk

Why dns needs a policy

This tool retrieves DNS records without creating, modifying, or deleting data. It is a standard read operation with no side effects or irreversible actions. The low severity reflects that DNS records are typically public information and misuse would result in information disclosure rather than damage or unauthorized access.

From the tool's definition Tool name 'dns' and description 'Get DNS records for a domain' indicate data retrieval with no modification capability. DNS queries are read-only operations that retrieve existing DNS record information.

Documented attack patterns abuse exactly the kind of access dns gives an agent:

POLICY

How to control dns

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 dns:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "dns": {}
  }
}

dns is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register NetworksDB-MCP — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More NetworksDB-MCP tools

Read asn_info Get information about an ASN. Read asn_networks Get networks belonging to an ASN. Read ip_geo Get geolocation information for an IP address. Read ip_info Get information about an IP address. Read key_info Get information about your NetworksDB API key and usage statistics. Read mass_reverse_dns Get reverse DNS records for a range of IP addresses or CIDR. Read org_info Get information about an organization. Read org_networks Get networks belonging to an organization.

All 11 NetworksDB-MCP tools →

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about dns

What does the dns tool do? +

Get DNS records for a domain. It is categorised as a Read tool in the NetworksDB-MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on dns? +

Register the NetworksDB- MCP server in PolicyLayer and add a rule for 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.

What risk level is dns? +

dns is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit dns? +

Yes. Add a rate_limit block to the 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.

How do I block dns completely? +

Set action: deny in the PolicyLayer policy for 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.

What MCP server provides dns? +

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.

Enforce policy on every NetworksDB-MCP tool call.

Start from NetworksDB-MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →