How to correctly add meta tags to custom menu items?
You can do this manually by using drupal_add_html_head(); in your menu's callback function

&lt;?php

function mymodule_home_page() {

  $element = array(
    '#tag' =&gt; 'meta', 
    '#attributes' =&gt; array( 
      'name' =&gt; 'custom meta info', 
      'content' =&gt; 'test content',
      'attributes' =&gt; 'D7',
    ),
  );
  drupal_add_html_head($element, 'Test');

  return 'hello';
} 
?&gt;


or some modules will allow you to add custom paths.