Block_transformer Item component feedback

For those who don't know: "block_transformer" is an in-development component for items like the shovel or hoe to change blocks into blocks like the path block or farmland block respectively.

I'd like to see this component have features similar to the "tool" component. For example; The tool component contains a list of "rules" that defines what that tool can and can't mine.
This new block_transformer component seems like it should use the same sorting mechanic so that multiple blocks can be effected using the same item.

Each rule should ask for 5 things:
1. What block is being changed?
2. What block state is required?   (To deal with half-eaten cake nonsense.)
3. What block does it turn into?
4. What block state is it?
5. Does the player need to crouch?

Introducing the need to crouch should help avoid deleting items from storage blocks and allow for multiple block transformation paths. I would also like to manage the damage the item takes per use and what sound that action makes.