Reinforced: 10% chance per level of not using durability.
Stonebound: The tool mines faster as it wears out, but does less damage.
Jagged: The tool does more damage as it wears out, but mines slower.
Writable: One extra modifier per piece.
Thaumic: One extra modifier for using a single piece, two extra for using at least 3 pieces or by making in entirely from thaumium in the event the tool you make has 2 components (i.e. a shovel or a hatchet).
Slimy (Blue Text): Randomly spawns small Blue Slimes (mob).
Slimy (Green Text): Randomly spawns small Green Slimes (mob).
Tasty: Randomly drops.
Modifiable: Gives 1 Modifier per piece or 11 total by making the tool entirely from Magical Wood regardless of how many parts it uses. (Paper gives more mining speed)
Heavy (Black Text): Gives you -10% speed per piece while you wield it.
Heavy (Purple Text): Seems to act like stonebound.
Tough: Unknown effect, presumably similar to Reinforced.
Slimy Pink: Unknown effect, presumably similar to Slimy, except with Pink Slimes.
Shiny: Unknown effect.
Dense: Unknown effect, presumably similar to Reinforced.
Mathematical: Tool is unbreaking if all parts are mathematical.(?)