This is a full list of modifiers in the game and a description of what they do.
These effects are applied when breaking blocks.
id: attracting | crafting: minecraft:iron_block 
Decription: Upon breaking a block (allowed by tool type), all items at that block's position will teleport to you.
id: veiny | crafting: minecraft:diamond_pickaxe 
Decription: Breaking any block while crouching will cause all blocks of the same type adjacent to it to break up to 5 in each direction.
id: learning | crafting: minecraft:book 
Decription: After breaking 10 blocks as allowed by this tool, gain 3 experience points.
id: melting | crafting: minecraft:magma_cream 
Decription: Items dropped by blocks broken with this tool will be smelted.
id: explode | crafting: minecraft:tnt 
Decription: Upon breaking a block (allowed by tool type), the current block position will explode causing damage to surrounding blocks.
These effects are applied when holding the tool.
id: hasty | crafting: minecraft:sugar 
Decription: While holding the tool, get the Haste I effect.
id: rainy | crafting: minecraft:cauldron 
Decription: While holding the tool in the rain, mine faster!
id: absorption | crafting: minecraft:golden_apple 
Decription: While holding the tool, get the absorption I effect.
id: detecting | crafting: minecraft:spyglass 
Decription: While holding the tool, ores around you will glow.
id: living | crafting: minecraft:moss_block 
Decription: While holding the tool, it will randomly heal itself
id: filling | crafting: minecraft:cake 
Decription: While holding the tool, get the saturation I effect.
id: spawner | crafting: minecraft:mossy_cobblestone 
Decription: While holding the spawners around you will glow.
These effects are applied when right clicking.
id: fire_place | crafting: minecraft:flint_and_steel 
Decription: Right clicking on the top of a block while crouching with the tool in hand will start a fire and use 2 durability points.
id: dirt_place | crafting: minecraft:dirt 
Decription: Right clicking on the top of a block with the tool in hand will place a dirt block and use 1 durability points.
id: flame_thrower | crafting: minecraft:fire_charge 
Decription: Right clicking throws a fire ball.
id: torch_place | crafting: minecraft:glowstone 
Decription: Right clicking on the top of a block with the tool in hand will place a torch and use 10 durability points.
These effects are applied when hurting enemies.
id: necrotic | crafting: minecraft:wither_skeleton_skull 
Decription: Heals 10% of damage dealt to target.
id: bezerk | crafting: minecraft:beef 
Decription: Deals more damage at lower player health.
id: combo | crafting: minecraft:chorus_fruit 
Decription: Hitting enemies within 2 seconds after hitting them deals an extra 25% damage.
id: poison | crafting: minecraft:poisonous_potato 
Decription: When attacking with tool, apply the poison I effect to the target for 5 seconds.
id: flaming | crafting: minecraft:blaze_rod 
Decription: Sets enemy on fire for 2 seconds.
id: charged | crafting: minecraft:lightning_rod 
Decription: After 7 seconds, hitting and enemy will summon a lightning bolt and empty the charge meter.
id: wither | crafting: minecraft:wither_rose 
Decription: When attacking with tool, apply the wither I effect to the target for 3 seconds.
id: critical | crafting: minecraft:ghast_tear 
Decription: Always critically strikes enemy.
id: blinding | crafting: minecraft:carrot 
Decription: When attacking with tool, apply the blindness I effect to the target for 4 seconds.
These effects are used to calculate stats for tools.
id: busted | crafting: minecraft:cracked_stone_bricks 
Decription: Dig speed is increased as tool durability drops.
These effects are general and don't fit into any other categories.
id: unbreaking | crafting: minecraft:obsidian 
Decription: This tool has a 20% chance of not taking damage.