list_entity_registry

What list_entity_registry does on Ha Nexus Agent

AI agents call list_entity_registry to retrieve information from Ha Nexus Agent without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Why list_entity_registry is rated Low

This tool queries and returns data from Home Assistant's entity registry without creating, modifying, deleting, or executing any actions. The word 'Get' in the description confirms it is a read-only operation. The blast radius of misuse is minimal—an attacker learns the structure and configuration of entities in the smart home but cannot control devices or alter settings.

From the tool's definition Tool name 'list_entity_registry' and description 'Get raw entity registry (includes disabled, hidden entities)' both indicate a retrieval operation with no modification or side effects.

The rule that runs list_entity_registry safely

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

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

Questions about list_entity_registry