"Precision" Enchantment for tools.

This Enchantment would only have 1 tier. It would only mine the first block type that is broken whilst the tool is continuously breaking blocks.

For example: Using a Shovel with this Enchantment, a player starts shovelling Grass Blocks and holds the mine button down. The player then points the crosshair towards Dirt Blocks - the tool doesn't break the Dirt Blocks until the button is released and held down again.

This Enchantment allows fast resource gathering without breaking unwanted blocks when using high Efficiency. Some uses may include but wouldn't be limited to:

Only mining a certain colour Terracotta from Mesa biomes.
Only mining Sandstone in Deserts whilst avoiding Stone.
Only mining Gravel in a Gravelly Mountains whilst avoiding Grass and Dirt Blocks.
Only mining Clay and not Sand on river beds.
Only breaking Vines and not the Leaves they are placed on when using Shears.

On first thought, this can be considered annoying or awkward when wanting to mine out large areas. However - because it's an Enchantment, it doesn't have to be utilised on every tool and can be reserved specifically for tools used in resource gathering sessions.

An alternative idea is that instead of not breaking a second block type - it does but at the rate that punching the block would