unifi_play_chime · Garza Home MCP: Risk & Policy

WHAT IT DOES

What unifi_play_chime does on Garza Home MCP

AI agents invoke unifi_play_chime to trigger actions in Garza Home MCP. 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 unifi_play_chime needs a policy

This tool executes an action on physical hardware (a UniFi chime/speaker), causing a real-world effect. It is not merely reading data or writing a record — it triggers an external operation. Misuse could cause repeated or disruptive noise in a home environment, but the blast radius is limited to nuisance-level disruption rather than data loss or financial harm.

From the tool's definition 'Play chime' — triggers an external hardware action on a UniFi device (activates a physical chime/speaker)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

unifi_play_chime Rate-limited

unifi_play_chime 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": {
    "unifi_play_chime": {
      "limits": [
        {
          "counter": "unifi_play_chime_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 Garza Home MCP, so you can run agents against it safely.

FAQ

Questions about unifi_play_chime

What does the unifi_play_chime tool do? +

Play chime. It is categorised as a Execute tool in the Garza Home MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on unifi_play_chime? +

Register the Garza Home MCP server in PolicyLayer and add a rule for unifi_play_chime: 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 Garza Home MCP. Nothing to install.

What risk level is unifi_play_chime? +

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

Can I rate-limit unifi_play_chime? +

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

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

unifi_play_chime is provided by the Garza Home MCP server (itsablabla/garza-home-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.