> ## Documentation Index
> Fetch the complete documentation index at: https://docs.lyzn.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Custom Tool Builder

> Build custom AI tools by connecting other nodes. This enables developers to create their own tools with custom logic chains.

# Custom Tool Builder

Build custom AI tools by connecting other nodes. This enables developers to create their own tools with custom logic chains.

## Properties

| Property   | Value            |
| ---------- | ---------------- |
| **Type**   | ai-extender-tool |
| **Family** | AI               |
| **Group**  | Tools            |

## Parameters

| Name            | Label            | Type          | Description                                                                                               | Required |
| --------------- | ---------------- | ------------- | --------------------------------------------------------------------------------------------------------- | -------- |
| toolName        | Tool Name        | String        | Name the AI will use to call this tool                                                                    | Yes      |
| toolDescription | Tool Description | String        | Description to help the AI understand when to use this tool                                               | Yes      |
| toolInputs      | Tool Inputs      | DynamicFields | Define the input parameters that AI will provide when calling this tool. Click 'Add Input' to add fields. | No       |

## Outputs

| Name       | Label      | Type   | Description                                      |
| ---------- | ---------- | ------ | ------------------------------------------------ |
| toolName   | toolName   | string | Name of the tool                                 |
| parameters | parameters | object | Parameters provided by AI when calling this tool |
| result     | result     | any    | Result from the custom chain to return to AI     |