configure_dns · Netmiko MCP Server MCP: Risk & Policy

WHAT IT DOES

What configure_dns does on Netmiko MCP Server

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

WHY IT NEEDS A POLICY

Why configure_dns needs a policy

This tool creates or modifies device configuration settings (Write category). While DNS changes are technically reversible, they affect network infrastructure stability and security. Severity is high because misconfiguration could disrupt network operations or redirect traffic maliciously.

From the tool's definition Tool name 'configure_dns' and description 'Configure DNS server on a router' indicate the tool modifies network device configuration.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

configure_dns Rate-limited

configure_dns 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": {
    "configure_dns": {
      "limits": [
        {
          "counter": "configure_dns_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Netmiko MCP Server, so you can run agents against it safely.

FAQ

Questions about configure_dns

What does the configure_dns tool do? +

Configure DNS server on a router. It is categorised as a Write tool in the Netmiko MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on configure_dns? +

Register the Netmiko MCP Server MCP server in PolicyLayer and add a rule for configure_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 Netmiko MCP Server. Nothing to install.

What risk level is configure_dns? +

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

Can I rate-limit configure_dns? +

Yes. Add a rate_limit block to the configure_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 configure_dns completely? +

Set action: deny in the PolicyLayer policy for configure_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 configure_dns? +

configure_dns is provided by the Netmiko MCP Server MCP server (owen123-lang/netmiko_mcp_server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.