vibekit_agent_compact · Vibekit MCP: Risk & Policy

WHAT IT DOES

What vibekit_agent_compact does on Vibekit

AI agents invoke vibekit_agent_compact 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_agent_compact needs a policy

The term 'compact' in the context of AI agents typically refers to compressing or summarizing the agent's context/memory, which is an operational action that triggers an external process on the agent. This is an Execute-level action as it modifies the agent's runtime state. However, the description is extremely sparse, lowering confidence. It could also be a Write operation if it merely updates configuration.

From the tool's definition 'Compact the agent' - description is minimal and uninformative about exact behavior

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

vibekit_agent_compact Rate-limited

vibekit_agent_compact 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_agent_compact": {
      "limits": [
        {
          "counter": "vibekit_agent_compact_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_agent_compact

What does the vibekit_agent_compact tool do? +

Compact the agent. 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_agent_compact? +

Register the Vibekit MCP server in PolicyLayer and add a rule for vibekit_agent_compact: 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_agent_compact? +

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

Can I rate-limit vibekit_agent_compact? +

Yes. Add a rate_limit block to the vibekit_agent_compact 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_agent_compact completely? +

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

vibekit_agent_compact 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.