Remove the site description
<?php
//* Remove the site description
remove_action( 'genesis_site_description', 'genesis_seo_site_description' );
//* Add the site description conditionally
add_action( 'genesis_site_description', 'maybe_site_description' );
function maybe_site_description() {
if ( is_home() ) {
genesis_seo_site_description();
}
}