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We need to block add parameter to constructor (if used in META-INF/services or in layer as newvalue) and static methods (if used in layers as methodvalue). Btw. there is an exception: it is possible to add FileObject argument and also String argument to factory methods methods used in layer.
I wouldn't bother. It is much more likely that people would just edit the method/constructor as text. (You would normally use Add Parameter if you already had several clients calling the method/constructor - which would not normally happen if you had a META-INF/services singleton or layer factory method.) Let's leave it for runtime errors.