manage_vouchers · Unifi MCP: Risk & Policy

WHAT IT DOES

What manage_vouchers does on Unifi

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

WHY IT NEEDS A POLICY

Why manage_vouchers needs a policy

The tool's primary capability is creating vouchers (Write operation). While it includes deletion, vouchers are access tokens rather than critical irreversible data—deletion is reversible by simply creating new ones. The 'list' operation is Read-only. The most severe applicable category is Write.

From the tool's definition Tool description states 'create, or delete hotspot vouchers' — creation is Write (reversible modification of voucher records), while deletion could suggest Destructive; however, guest WiFi vouchers are typically ephemeral access credentials with limited scope…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

manage_vouchers Rate-limited

manage_vouchers 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": {
    "manage_vouchers": {
      "limits": [
        {
          "counter": "manage_vouchers_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 Unifi, so you can run agents against it safely.

FAQ

Questions about manage_vouchers

What does the manage_vouchers tool do? +

List, create, or delete hotspot vouchers for guest WiFi access. It is categorised as a Write tool in the Unifi MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on manage_vouchers? +

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

What risk level is manage_vouchers? +

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

Can I rate-limit manage_vouchers? +

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

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

manage_vouchers is provided by the Unifi MCP server (pproenca/unifi-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.