vs_opencode_execute · VibeServe MCP: Risk & Policy

WHAT IT DOES

What vs_opencode_execute does on VibeServe

AI agents invoke vs_opencode_execute to trigger actions in VibeServe. 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 vs_opencode_execute needs a policy

The tool executes arbitrary coding tasks through a CLI agent, which can run shell commands and trigger external operations with side effects dependent on the arguments provided. While not explicitly destructive or financial, the ability to execute code through a CLI agent creates significant risk if misused by an AI agent—it could modify files, run arbitrary commands, or compromise system integrity.

From the tool's definition Tool name includes 'execute' and description states 'Execute a coding task using the OpenCode CLI agent.' This directly invokes external code execution via CLI agent.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

vs_opencode_execute Rate-limited

vs_opencode_execute 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": {
    "vs_opencode_execute": {
      "limits": [
        {
          "counter": "vs_opencode_execute_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 VibeServe, so you can run agents against it safely.

FAQ

Questions about vs_opencode_execute

What does the vs_opencode_execute tool do? +

Execute a coding task using the OpenCode CLI agent. It is categorised as a Execute tool in the VibeServe MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on vs_opencode_execute? +

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

What risk level is vs_opencode_execute? +

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

Can I rate-limit vs_opencode_execute? +

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

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

vs_opencode_execute is provided by the VibeServe MCP server (ncsound919/vibeserve). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.