During your opponent's turn, if the Pokémon Counterattack Claws is attached to is your Active Pokémon and an opponent's attack damages it (even if it is Knocked Out), flip a coin. If heads, put 2 damage counters on the Defending Pokémon. Then, discard Counterattack Claws.
Attach Counterattack Claws to 1 of your Pokémon that doesn't have a Pokémon Tool attached to it.