vibekit_add_domain · Vibekit MCP: Risk & Policy

WHAT IT DOES

What vibekit_add_domain does on Vibekit

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

WHY IT NEEDS A POLICY

Why vibekit_add_domain needs a policy

This tool creates or modifies infrastructure configuration (adding a domain to an app), which is a reversible Write action. While not destructive, it has significant blast radius because misconfiguration or abuse could redirect traffic, disrupt service availability, or enable phishing/impersonation attacks if an AI agent adds malicious domains to an app it controls. This elevates severity to high.

From the tool's definition 'Add a custom domain to an app' - creates a new domain configuration for an app that affects network routing and public accessibility. The tool modifies app infrastructure by registering a custom domain.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

vibekit_add_domain Rate-limited

vibekit_add_domain 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": {
    "vibekit_add_domain": {
      "limits": [
        {
          "counter": "vibekit_add_domain_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 Vibekit, so you can run agents against it safely.

FAQ

Questions about vibekit_add_domain

What does the vibekit_add_domain tool do? +

Add a custom domain to an app. After adding, update your DNS CNAME to point to vibekit.bot. It is categorised as a Write tool in the Vibekit MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on vibekit_add_domain? +

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

What risk level is vibekit_add_domain? +

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

Can I rate-limit vibekit_add_domain? +

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

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

vibekit_add_domain is provided by the Vibekit MCP server (vibekit-apps/vibekit-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.