JSDoc tags support in PhpStorm/WebStorm 5.0 has been improved to make your coding experience better. When something is known about current context, more relevant completion options will be shown and more static errors will be reported instantly. In the upcoming PhpStorm/WebStorm 5.0 EAP nearly all of Google Closure compiler JSDoc tags are supported. In addition to @param, @type, @extends etc., following tags will also be handled better:
@interface and @implements
When not all methods from interface are implemented, IDE will warn you about it and suggest to implement methods. Symbols from base interface will go to the completion list even if they are not implemented in a subclass (or IDE doesn’t see them to be implemented).
@private and @protected
Also @enum, @override, @inheritDoc, @property, @lends, @constructs, @mixin and @mixes are supported now and completion, documentation lookup and parameter info take them into consideration.
Coming soon: enhanced Google Closure types syntax.