At the very least, it seems counterproductive
This means that if you were to draw a Pot of Greed in your opening hand - something that the players of the 2003-2005 World Championships had a 12.5% chance of doing, as it was limited to a single copy per deck - your hand size increased from five to six and your deck size reduced down to 37, increasing your chances of drawing a specific card from 33.76% to 42.15%
Tools attach themselves to a specific Pokmon, and only affect that Pokmon for the entire time that they are attached
add 1 "Exosister" monster from your Deck to your hand
immediately after it resolves, Normal Summon 1 WIND monster, but for the rest of this turn you cannot Special Summon monsters from the Extra Deck, except Synchro Monsters
In Hearthstone, you drag your card to the battlefield, let it go, and that's basically it