These examples use the remove_attacks action to prevent dealing damage with specific items.

Disable Attacking with Specific Items

Prevents attacking with the "Stick" item.

{
  "action": "remove_attacks",
  "items": [
    "minecraft:stick"
  ]
}

Disable Modded Weapons

Prevents attacking with any weapon from the simplyswords mod using a Regex pattern.

{
  "action": "remove_attacks",
  "pattern": "/simplyswords:.*_sword/"
}

Protect Specific Entities

Prevents players from attacking Villagers with any item. Note that the filter is empty for items, meaning it applies to everything when targeting a Villager.

{
  "action": "remove_attacks",
  "entities": [
    "minecraft:villager"
  ]
}