minecraft-assets/data/minecraft/loot_tables/gameplay/hero_of_the_village/mason_gift.json

{
  "type": "minecraft:gift",
  "pools": [
    {
      "rolls": 1,
      "entries": [
        {
          "type": "minecraft:item",
          "name": "minecraft:clay"
        }
      ]
    }
  ]
}