get all variables of a type from an object's components

I have a Behavior tree and i want my Condition Node to get all variables of a type(bools for example) of all(or a certain) component attached to the object holding the tree. and then show it in the inspector as an enum or whatever.

how would i go to achieve this? i thought about using a string like "getcomponent().sprite" and somehow use that string to get the sprite variable but that will be expensive if i do it every frame