Incomplete Smithing Transformation

Are there any other prerequisites I need to meet to make this smithing table transformation applicable, it doesn't do anything atm
  "type": "minecraft:smithing_trim",
  "template": {
    "item": "minecraft:netherite_upgrade_smithing_template"
  },
  "base": {
    "tag": "minecraft:enchantable/durability"
  },
  "addition": {
    "item": "minecraft:gold_ingot"
  }
}```
```{
  "asset_id": "minecraft:gild",
  "description": {
    "translate": "trim_pattern.minecraft.gild"
  },
  "template_item": "minecraft:netherite_upgrade_smithing_template"
}```