/usr/sbin/mc-facts is in mcollective-client 1.2.1+dfsg-2ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | #!/usr/bin/env ruby
require 'mcollective'
if $0 =~ /mc\-(.+)$/
    app_name = $1
    if MCollective::Applications.list.include?(app_name)
        MCollective::Applications.run(app_name)
    else
        STDERR.puts "Cannot find the #{app_name} command in the applications plugin directory"
    end
else
    STDERR.puts "Do not know which command to run, please run mc help for details"
end
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