{
    "pools": [
      {
        "rolls": 1,
        "entries": [
          {
            "type": "minecraft:tag",
            "name": "minecraft:pickaxes",
            "expand": true,
            "functions": [ {
              "function": "set_damage",
              "damage": 0.5
            } ]
          }
          
        ]
      }
    ]
  }