create_zone

Create a zone via WS config/zone/create (zone helper integration).

SERVERHa Nexus Agent SOURCEfistacho/ha-nexus-agent

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/fistacho-ha-nexus-agent/create-zone.md

WHAT IT DOES

What create_zone does on Ha Nexus Agent

AI agents use create_zone to create or update resources in Ha Nexus Agent, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Ha Nexus Agent environment.

RISK

Why create_zone is rated Medium

Creating a zone in Home Assistant is a reversible write operation that adds new helper configuration data. It does not delete or destroy data (ruling out Destructive), does not execute arbitrary code or commands (not Execute), and does not involve financial transactions (not Financial).

From the tool's definition Tool description states "Create a zone" - a direct creation action that modifies Home Assistant configuration by adding a new zone helper entity. The `config/zone/create` endpoint is explicitly invoked to add configuration data.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

create_zone Rate-limited

create_zone stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_zone": {
      "limits": [
        {
          "counter": "create_zone_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT 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 create_zone call is checked against it from then on.

FAQ

Questions about create_zone

What does the create_zone tool do? +

Create a zone via WS config/zone/create (zone helper integration). It is categorised as a Write tool in the Ha Nexus Agent MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_zone? +

Register the Ha Nexus Agent MCP server in PolicyLayer and add a rule for create_zone: 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 create_zone? +

create_zone is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create_zone? +

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

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

create_zone 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.

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