set_light_brightness · Bond MCP Server MCP: Risk & Policy

WHAT IT DOES

What set_light_brightness does on Bond MCP Server

AI agents invoke set_light_brightness to trigger actions in Bond MCP Server. 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 set_light_brightness needs a policy

This tool sends a command to control a physical smart home device (dimmable light), triggering an external operation. It's not a simple data write/read but an execution of a physical action through the Bond Bridge API. Misuse could cause unexpected lighting changes in a home environment, but the blast radius is limited to lighting control.

From the tool's definition Set brightness for a dimmable light device — triggers an external physical operation on a smart home device via the Bond Local API

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_light_brightness Rate-limited

set_light_brightness 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": {
    "set_light_brightness": {
      "limits": [
        {
          "counter": "set_light_brightness_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 Bond MCP Server, so you can run agents against it safely.

FAQ

Questions about set_light_brightness

What does the set_light_brightness tool do? +

Set brightness for a dimmable light device. It is categorised as a Execute tool in the Bond MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on set_light_brightness? +

Register the Bond MCP Server MCP server in PolicyLayer and add a rule for set_light_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 Bond MCP Server. Nothing to install.

What risk level is set_light_brightness? +

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

Can I rate-limit set_light_brightness? +

Yes. Add a rate_limit block to the set_light_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 set_light_brightness completely? +

Set action: deny in the PolicyLayer policy for set_light_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 set_light_brightness? +

set_light_brightness is provided by the Bond MCP Server MCP server (madorn/bond-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.