dns_resolve

Resolve a hostname to DNS records using the system resolver or an optional DNS server.

SERVERJshookmcp SOURCE@jshookmcp/jshook

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-vmoranv-jshookmcp/dns-resolve.md

WHAT IT DOES

What dns_resolve does on Jshookmcp

AI agents use dns_resolve to create or update resources in Jshookmcp, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Jshookmcp environment.

RISK

Why dns_resolve is rated Medium

An AI agent can call dns_resolve faster than any human can review: one bad instruction and it creates or modifies resources in Jshookmcp by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs dns_resolve safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Jshookmcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For dns_resolve, this is the rule to start with:

dns_resolve Rate-limited

dns_resolve stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "dns_resolve": {
      "limits": [
        {
          "counter": "dns_resolve_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Jshookmcp, apply this rule, and every dns_resolve call is checked against it from then on.

FAQ

Questions about dns_resolve

What does the dns_resolve tool do? +

Resolve a hostname to DNS records using the system resolver or an optional DNS server. It is categorised as a Write tool in the Jshookmcp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on dns_resolve? +

Register the Jshook MCP server in PolicyLayer and add a rule for dns_resolve: 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 Jshookmcp. Nothing to install.

What risk level is dns_resolve? +

dns_resolve is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit dns_resolve? +

Yes. Add a rate_limit block to the dns_resolve 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_resolve completely? +

Set action: deny in the PolicyLayer policy for dns_resolve. 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_resolve? +

dns_resolve is provided by the Jshook MCP server (@jshookmcp/jshook). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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