Particular meta tag – viewport – insertion when dealing with plugin

by

Cant you just use the wp_head action for this?
I mean something like this:

function add_meta_tags() {
?>
  <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1">
<?php }
add_action('wp_head', 'add_meta_tags');

Should work perfectly.