list_areas

List all areas (rooms) in Home Assistant.

SERVERHa Nexus Agent SOURCEfistacho/ha-nexus-agent

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/fistacho-ha-nexus-agent/list-areas.md

WHAT IT DOES

What list_areas does on Ha Nexus Agent

AI agents call list_areas 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.

RISK

Why list_areas is rated Low

This tool retrieves configuration data (the list of defined areas/rooms) without modifying, deleting, or executing anything. It has no side effects and poses minimal risk even if an AI agent calls it without proper context.

From the tool's definition Tool name is 'list_areas' and description states 'List all areas (rooms) in Home Assistant.' The verb 'list' and the absence of any modification, deletion, or execution language indicate a read-only data retrieval operation.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs list_areas 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_areas, this is the rule to start with:

list_areas Allowed

list_areas 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": {
    "list_areas": {}
  }
}

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

The button opens the PolicyLayer dashboard: create your workspace, connect Ha Nexus Agent, apply this rule, and every list_areas call is checked against it from then on.

FAQ

Questions about list_areas

What does the list_areas tool do? +

List all areas (rooms) in Home Assistant. It is categorised as a Read tool in the Ha Nexus Agent MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_areas? +

Register the Ha Nexus Agent MCP server in PolicyLayer and add a rule for list_areas: 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 Ha Nexus Agent. Nothing to install.

What risk level is list_areas? +

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

Can I rate-limit list_areas? +

Yes. Add a rate_limit block to the list_areas 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 list_areas completely? +

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

list_areas is provided by the Ha Nexus Agent MCP server (fistacho/ha-nexus-agent). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Ha Nexus Agent, and thousands of servers like it.

This server

All 276 Ha Nexus Agent tools →

Across the catalogue

aiva_list_affiliates on AIVA MCP Server →list_agents on 0rca Dojo MCP Server → The MCP Attack Database →

Guides

Roll out MCP under one policy →Data exfiltration →MCP token cost →