devices

What devices does on Mcp Control Plane

AI agents call devices to retrieve information from Mcp Control Plane without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Why devices is rated Low

This tool queries and retrieves device registry data from Home Assistant. It has no side effects — it does not create, modify, delete, or execute any operations. The blast radius of misuse is minimal: an unauthorized agent could enumerate devices in a home automation environment, but cannot alter configuration, control devices, or cause irreversible harm. This is a classic Read category tool.

From the tool's definition The tool 'devices' is described as 'Return Home Assistant device registry' — a retrieval operation with no mutation, deletion, or execution semantics. The verb 'Return' indicates a read-only query.

The rule that runs devices safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Mcp Control Plane, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For devices, this is the rule to start with:

{
  "version": "1",
  "default": "deny",
  "tools": {
    "devices": {}
  }
}

Questions about devices