Cpp Coding Standards/CODEDOC/ClassResp
Every class should have one cohesive responsibility (see CLSDESIGN:OneResp ). Express that in a precise statement.
A class normally is more complex than can be expressed in one name. Therefore most times a comment is necessary. There may be very few cases where this is unnecessary. But in most cases it is necessary, like for a class “String”: Is it an ASCII String or Unicode? Is it static or allows manipulation?