mikrotik_add_dns_regexp · MikroTik MCP: Risk & Policy

WHAT IT DOES

What mikrotik_add_dns_regexp does on MikroTik MCP

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

WHY IT NEEDS A POLICY

Why mikrotik_add_dns_regexp needs a policy

This tool creates or modifies DNS regexp entries, which is a Write operation—it changes network configuration reversibly. Severity is high because misconfigured DNS regexp rules could redirect traffic to malicious hosts, intercept communications, or disrupt network services, potentially affecting all devices relying on that RouterOS instance.

From the tool's definition Tool name contains 'add', description states 'Adds a DNS regexp entry', indicating creation/modification of DNS configuration data on MikroTik RouterOS devices.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

mikrotik_add_dns_regexp Rate-limited

mikrotik_add_dns_regexp 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": {
    "mikrotik_add_dns_regexp": {
      "limits": [
        {
          "counter": "mikrotik_add_dns_regexp_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 MikroTik MCP, so you can run agents against it safely.

FAQ

Questions about mikrotik_add_dns_regexp

What does the mikrotik_add_dns_regexp tool do? +

Adds a DNS regexp entry for pattern matching. It is categorised as a Write tool in the MikroTik MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on mikrotik_add_dns_regexp? +

Register the MikroTik MCP server in PolicyLayer and add a rule for mikrotik_add_dns_regexp: 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 MikroTik MCP. Nothing to install.

What risk level is mikrotik_add_dns_regexp? +

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

Can I rate-limit mikrotik_add_dns_regexp? +

Yes. Add a rate_limit block to the mikrotik_add_dns_regexp 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 mikrotik_add_dns_regexp completely? +

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

mikrotik_add_dns_regexp is provided by the MikroTik MCP server (tarcisiodier/mcp-mikrotik). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.