jcmd help command should not require the process identification

Now the jcmd help command requires the process identification either with process id or the main class name which is unnecessary and confusing:

% /java/re/jdk/9/latest/binaries/linux-x64/bin/jcmd help
Error parsing arguments: No command specified
. . . .

 % /java/re/jdk/9/latest/binaries/linux-x64/bin/jcmd help VM.flags
Could not find any processes matching : 'help'

But the command works if the process id is specified:

/java/re/jdk/9/latest/binaries/linux-x64/bin/jcmd 28650 help
28650:
The following commands are available:
JFR.configure
JFR.stop
JFR.start
JFR.dump
JFR.check
VM.log
. . . .

/java/re/jdk/9/latest/binaries/linux-x64/bin/jcmd 28650 help VM.flags
28650:
VM.flags
Print VM flag options and their current values.
. . . .

The tool has to be fixed so that the jcmd help command would work without requiring process id or main class name.