No Cooldown Weapon / Dagger

Now that Minecraft is adding new weapons with fresh mechanics, I think it would be a great idea to add something like a dagger that has no cooldown (or less), but a shorter attack range or slightly lower damage per second than a sword. It could also allow the player to block attacks with the dagger, reducing a small amount of damage received, or that the dagger can be thrown. There could be other ways to balance the weapon so that it is not better or worse than the sword, just different.