|buildtool not executable||
The build tool (Build.PL/Makefile.PL) is executable. This is bad because you should specify which perl you want to use while installing.
Change the permissions of Build.PL/Makefile.PL to not-executable.
|has known license in source file||
Does not have license information in any of its source files, or the information is not recognized by Software::License
Add =head1 LICENSE and/or the proper text of the well-known license to the main module in your code.
This distribution is not required by another distribution by another author.
Convince / force / bribe another CPAN author to use this distribution.
Excellent. Your distribution passes all the experimental metrics.