/usr/share/man/man1/picard-tools.1.gz is in picard-tools 2.8.1+dfsg-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man1/PicardCommandLine.1.gz
/usr/share/man/man1/PicardCommandLine.1.gz