I’m not sure what you mean by inherit tags, if it is not for search - is there any other way than search, where inheriting a tag would make a difference?
And one minor detail. If a parent node has tag #foo, then each child would inherit #foo, so a search for #foo would also find all the children, which is probably not intended.
That is why in my proposal I suggest that at least of of the search terms must be found in the target node.