fibaro_set_brightness · Fibaro HC3 MCP Server MCP

WHAT IT DOES

What fibaro_set_brightness does on Fibaro HC3 MCP Server

AI agents use fibaro_set_brightness to create or update resources in Fibaro HC3 MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Fibaro HC3 MCP Server environment.

WHY IT NEEDS A POLICY

Why fibaro_set_brightness needs a policy

This tool modifies the state of a physical device (brightness/dimmer level) in a smart home system. It is a reversible write operation — the brightness can be changed again at any time. No data is deleted, no code is executed arbitrarily, and no financial transaction occurs.

From the tool's definition Set brightness or dimmer level for lights and dimmable devices

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

fibaro_set_brightness Rate-limited

fibaro_set_brightness 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": {
    "fibaro_set_brightness": {
      "limits": [
        {
          "counter": "fibaro_set_brightness_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 Fibaro HC3 MCP Server, so you can run agents against it safely.

FAQ

Questions about fibaro_set_brightness

What does the fibaro_set_brightness tool do? +

Set brightness or dimmer level for lights and dimmable devices. Use this when user mentions brightness, dimming, intensity, or percentage levels (0-100%). Keywords: bright, dim, brightness, level, percent, %. It is categorised as a Write tool in the Fibaro HC3 MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on fibaro_set_brightness? +

Register the Fibaro HC3 MCP Server MCP server in PolicyLayer and add a rule for fibaro_set_brightness: 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 Fibaro HC3 MCP Server. Nothing to install.

What risk level is fibaro_set_brightness? +

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

Can I rate-limit fibaro_set_brightness? +

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

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

fibaro_set_brightness is provided by the Fibaro HC3 MCP Server MCP server (kaeljune/fibaro-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.