vibe_upgrade_design · VibeServe MCP: Risk & Policy

WHAT IT DOES

What vibe_upgrade_design does on VibeServe

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

WHY IT NEEDS A POLICY

Why vibe_upgrade_design needs a policy

The tool upgrades (modifies) an existing design template, which constitutes a Write operation. It applies production patterns to a template, likely overwriting or updating it. Severity is medium because it modifies potentially important UI code/templates, though changes are likely reversible via version control.

From the tool's definition 'Upgrade a design template with senior-dev production patterns' — modifies/overwrites an existing design template

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

vibe_upgrade_design Rate-limited

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

FAQ

Questions about vibe_upgrade_design

What does the vibe_upgrade_design tool do? +

Upgrade a design template with senior-dev production patterns. It is categorised as a Write tool in the VibeServe MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on vibe_upgrade_design? +

Register the VibeServe MCP server in PolicyLayer and add a rule for vibe_upgrade_design: 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 vibe_upgrade_design? +

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

Can I rate-limit vibe_upgrade_design? +

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

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

vibe_upgrade_design 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.