What is special about the "name" attribute in this moose module?

gistfile1.pl

use Modern::Perl;
package A;
use Moose;
use YAML::XS;

has size => (
    is => 'ro',
    default => 4,
);

has place => (
    is => 'ro',
    default => 'main street',
);

has name => (
    is => 'ro',
    default => 'bob',
);

has alt => (
    is => 'ro',
    builder => '_build_aux',
);

sub _build_aux {
    my $s = shift;

    say Dump $s;
    return reverse $s->name;
}

package main;

my $x = A->new();

say $x->name;