According to 43037 shortcuts should be available for
Searches of the Perldocs: [perldoc://search terms]
Link directly to perldoc entries: [doc://document name]
Link directly to functions within perlfunc: [doc://function name]
But while the first one indeed does work, it seems to me that doc:// only links directly to functions, and I think it would be desirable to have a shortcut to directly link say modules, also because if you think about it from the point of view of the cmd line UI it is that form of perldoc that is in some sense the most straightforward.
Example: [doc://Benchmark], which indeed is not what intended and IMHO doesn't match well with 'perldoc Benchmark'.