home-assistant.list_entities

List or search Home Assistant entities (lights, sensors, switches, climate, etc.) with their current state. Use to find the entity_id before reading or controlling a device.

SERVERCoWork OS SOURCECoWork-OS/CoWork-OS

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/cowork-os/home-assistant.list-entities.md

WHAT IT DOES

What home-assistant.list_entities does on CoWork OS

AI agents call home-assistant.list_entities to retrieve information from CoWork OS without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why home-assistant.list_entities is rated Low

Tool only retrieves entity information and state data without modifying or controlling devices.

From the tool's definition List or search Home Assistant entities with current state

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs home-assistant.list_entities safely

PolicyLayer is an MCP gateway: it sits between your AI agents and CoWork OS, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For home-assistant.list_entities, this is the rule to start with:

home-assistant.list_entities Allowed

home-assistant.list_entities is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "home-assistant.list_entities": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect CoWork OS, apply this rule, and every home-assistant.list_entities call is checked against it from then on.

FAQ

Questions about home-assistant.list_entities

What does the home-assistant.list_entities tool do? +

List or search Home Assistant entities (lights, sensors, switches, climate, etc.) with their current state. Use to find the entity_id before reading or controlling a device. It is categorised as a Read tool in the CoWork OS MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on home-assistant.list_entities? +

Register the CoWork OS MCP server in PolicyLayer and add a rule for home-assistant.list_entities: 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 CoWork OS. Nothing to install.

What risk level is home-assistant.list_entities? +

home-assistant.list_entities is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit home-assistant.list_entities? +

Yes. Add a rate_limit block to the home-assistant.list_entities 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 home-assistant.list_entities completely? +

Set action: deny in the PolicyLayer policy for home-assistant.list_entities. 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 home-assistant.list_entities? +

home-assistant.list_entities is provided by the CoWork OS MCP server (CoWork-OS/CoWork-OS). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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