How do I pass parameters from a blocks to fields?

I have defined some fields in the fields folder, e.g.

and I import and use them across several blocks, however I would like to be able to configure some options differently specific to the block into which I am importing it (e.g. on the hero block, two buttons can be added, but on some other blocks only one button should be allowed) .

How might I be able to go about something like this?