From Brotato Wiki
Item
Improved Tools is an in-game item that can be bought from a Shop or can be found in a Crate. Most Items modify the Stats of the player, and some of them provide additional effects.
Unique
Improved Tools is a unique item. Only 1 of each unique item can be equipped, and it will then no longer be offered in the Shop, and no longer drop from loot crates.
Improved Tools
Improved Tools increases the speed of all Engineering structures by half of the current Attack Speed.
This also applies to Landmines, which will spawn faster, and Gardens which will generate healing fruits faster.
All Engineering structures are affected, no matter the source of the structure.
The in-game tooltip for this item incorrectly states that the "attack cooldown" is reduced by the given amount; this is not the case. The item reduces the effect rate of the structures in the same way as Attack Speed does increase the attack rate of weapons.
Improved Tools is a powerful item for Engineering builds, but requires you to invest in attack speed, something you might not otherwise would want to do.