update_dns_record · Vultr Dns MCP: Risk & Policy

WHAT IT DOES

What update_dns_record does on Vultr Dns

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

WHY IT NEEDS A POLICY

Why update_dns_record needs a policy

This tool modifies DNS records reversibly without deletion. While DNS changes can have significant blast radius (redirecting traffic, breaking services, phishing attacks), the action is reversible through subsequent updates. It does not delete data (Destructive), execute arbitrary code (Execute), or move money (Financial).

From the tool's definition Tool name is "update_dns_record" and description states "Update an existing DNS record with new configuration". The verb "update" and phrase "with new configuration" indicate modification of existing data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_dns_record Rate-limited

update_dns_record 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": {
    "update_dns_record": {
      "limits": [
        {
          "counter": "update_dns_record_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 Vultr Dns, so you can run agents against it safely.

FAQ

Questions about update_dns_record

What does the update_dns_record tool do? +

Update an existing DNS record with new configuration. It is categorised as a Write tool in the Vultr Dns MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on update_dns_record? +

Register the Vultr Dns MCP server in PolicyLayer and add a rule for update_dns_record: 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 Vultr Dns. Nothing to install.

What risk level is update_dns_record? +

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

Can I rate-limit update_dns_record? +

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

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

update_dns_record is provided by the Vultr Dns MCP server (rsp2k/vultr-dns-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.