Depends on the request.
If it's in the "Needs details or plan" column of the MediaWiki-API workboard, that usually means discussion of some sort is needed. That could be discussion to determine if the change is actually a good idea, or just discussion to figure out how to actually do it.
If it's in "Needs Code", that normally means someone should write the code and then try to get me to review it. Or hope I find it interesting/useful enough to write the code myself.