vibekit_chat · Vibekit MCP: Risk & Policy

WHAT IT DOES

What vibekit_chat does on Vibekit

AI agents invoke vibekit_chat to trigger actions in Vibekit. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why vibekit_chat needs a policy

The server description states it facilitates 'execution of headless coding tasks through natural language.' Sending a message to an app via this MCP server likely triggers agent execution of arbitrary tasks, making this an Execute-category tool.

From the tool's definition "Send a message to an app" — triggers interaction with a hosted AI agent that can execute headless coding tasks through natural language

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

vibekit_chat Rate-limited

vibekit_chat stays usable, but rate-capped — a runaway agent can't fire it dozens of times 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_chat": {
      "limits": [
        {
          "counter": "vibekit_chat_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-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_chat

What does the vibekit_chat tool do? +

Send a message to an app. It is categorised as a Execute tool in the Vibekit MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on vibekit_chat? +

Register the Vibekit MCP server in PolicyLayer and add a rule for vibekit_chat: 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_chat? +

vibekit_chat is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit vibekit_chat? +

Yes. Add a rate_limit block to the vibekit_chat 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_chat completely? +

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

vibekit_chat 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.