FOR SNAPSHOT 24w06a-24w08a (Since it uses new attribute features introduced in this version)
NBT GOT REWORKED SO IT NO LONGER WORKS 24w09a+
<Should be Multiplayer Compatible>

This datapack randomly assigns a rarity and attributes on held armor and tools:

- Poor (10% Chance with 2x Negative Attributes)
- Common (30% Chance with 1x Negative Attribute and 50% chance of 1x Tier 1 Attribute)
- Rare (25% Chance with 1x Tier 1 or 2 Attribute and 25% chance of 1x Negative Attribute)
- Mythic (20% Chance with 2x Tier 1 to 3 Attributes and a 10% chance of 1x Negative Attribute)
- Legendary (15% Chance with 3x Tier 2 to 3 Attributes)

Depending on the rarity, it randomly assigns one of 8 attribute modifiers with 4 tiers on the selected tool: Negative, Tier 1, Tier 2, or Tier 3:

Tools (Pickaxe, Axe, Shovel, Hoe, Sword):
- Extended (Modification of Block and Entity Interaction Range) [​Tier 1 - 3]; Contracted [​Negative]
- Streamlined (Modification of Attack and Block Break Speed) [​T1-3]; Clunky [​Negative]
- Sharp (Modification of Attack Damage) [​T1-3]; Dull [​Negative]
- Heavy (Modification of Movement Speed) [​Negative]

Armor (Leather, Iron, Gold, Diamond, Netherite)
- Reinforced (Modification of Armor, Armor Toughness, and Knockback Resistance) [​T1-3]; Debilitated [​Negative]
- Vitality (Modification of Max Health) [​T1-3]; Frailty [​Negative]
- Light (Modification of Gravity, Safe Fall Distance, and Step Height) [​T1-3]; Heavy [​Negative]
- Agile (Modification of Movement Speed) [​T1-3]; Stiff [​Negative]

The exact modifiers can be found by referring to the guide in-game using the command:
/function minecraft:get_guide


Does not mess with enchantments, and items dropped by mobs or found in chests will automatically have attributes applied to them (without overwriting their original enchantments, etc.)