@minecraft/creator-tools/data/content/newitemjson/item_behavior.json

Minecraft Creator Tools command line and libraries.

{
  "format_version": "1.20.50",
  "minecraft:item": {
    "description": {
      "identifier": "examplens:examplename",
      "category": "nature"
    },
    "components": {
      "minecraft:icon": {
        "texture": "examplename"
      },
      "minecraft:display_name": {
        "value": "item.examplename.name"
      }
    }
  }
}