fibaro_set_color · Fibaro HC3 MCP Server MCP: Risk & Policy

WHAT IT DOES

What fibaro_set_color does on Fibaro HC3 MCP Server

AI agents use fibaro_set_color 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_color needs a policy

This tool writes a color value to a smart home lighting device. The action is reversible (color can be changed back), affects only lighting aesthetics, and has minimal blast radius. It falls squarely in the Write category as it modifies device state without executing arbitrary code or causing irreversible harm.

From the tool's definition 'Set RGB color for RGB lights and color-changing devices' — modifies device state (color setting) reversibly; no data deletion or financial action involved.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

fibaro_set_color Rate-limited

fibaro_set_color 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_color": {
      "limits": [
        {
          "counter": "fibaro_set_color_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_color

What does the fibaro_set_color tool do? +

Set RGB color for RGB lights and color-changing devices. Use this when user mentions colors, color names, or wants to change light color. Keywords: color, red, green, blue, yellow, purple, pink, orange, cyan, magenta, white, RGB, màu. 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_color? +

Register the Fibaro HC3 MCP Server MCP server in PolicyLayer and add a rule for fibaro_set_color: 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_color? +

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

Can I rate-limit fibaro_set_color? +

Yes. Add a rate_limit block to the fibaro_set_color 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_color completely? +

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

fibaro_set_color 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.