create_label

Create a new label via WS config/label_registry/create.

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-label.md

WHAT IT DOES

What create_label does on Ha Nexus Agent

AI agents use create_label 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_label is rated Medium

This tool creates a new label, which is a reversible operation that modifies data without executing external code or causing irreversible damage. Label creation is a normal administrative function with low blast radius—labels are organizational metadata used to tag entities, not core system configuration. Even if misused, labels can be deleted, making this a Write operation rather than Execute or Destructive.

From the tool's definition Tool name 'create_label' and description 'Create a new label via WS `config/label_registry/create`' indicate the tool creates new data (a label) in Home Assistant's label registry.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

create_label Rate-limited

create_label 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_label": {
      "limits": [
        {
          "counter": "create_label_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_label call is checked against it from then on.

FAQ

Questions about create_label

What does the create_label tool do? +

Create a new label via WS config/label_registry/create. 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_label? +

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

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

Can I rate-limit create_label? +

Yes. Add a rate_limit block to the create_label 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_label completely? +

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

create_label 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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