lvgl_add_widget

A write tool on the Ha Nexus Agent MCP server.

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/lvgl-add-widget.md

WHAT IT DOES

What lvgl_add_widget does on Ha Nexus Agent

AI agents use lvgl_add_widget 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 lvgl_add_widget is rated Medium

LVGL is a graphics/UI library commonly used in embedded/smart home displays. 'add_widget' implies creating/modifying a UI element, which is a Write operation. However, with no description, confidence is low. Severity is medium given it could affect smart home display configurations.

From the tool's definition Tool name 'lvgl_add_widget' suggests adding a widget to an LVGL (Light and Versatile Graphics Library) UI; description is empty and uninformative.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

lvgl_add_widget Rate-limited

lvgl_add_widget 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": {
    "lvgl_add_widget": {
      "limits": [
        {
          "counter": "lvgl_add_widget_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 lvgl_add_widget call is checked against it from then on.

FAQ

Questions about lvgl_add_widget

What does the lvgl_add_widget tool do? +

lvgl_add_widget is a write tool on the Ha Nexus Agent MCP server. 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 lvgl_add_widget? +

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

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

Can I rate-limit lvgl_add_widget? +

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

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

lvgl_add_widget 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

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