Document how to disable/modify meta tags

You can control which fields are available to "editors" by using hook_form_alter.
If you have a module you could do something like

function mymodule_form_alter( &$form, &$form_state, $form_id )
{
if( $form_id == 'page_node_form' )
{
//If you have theme developer module - you can see all the stuff you modify here
//dpm( $form );

//You'll probably want to edit the metatags key
//$form[ 'metatags' ][ ??? ]
}
}

I want this too. I have another keywords field with a requested higher char limit so want to hide this one (easily).

I marked both of these as duplicates: #1606310: Make Keywords and Description Required, #1782830: How can I do the field Keywords and the field Description mandatory in a specific content type?

I marked #1611584: Document how to change meta tag length as a duplicate.

Duplicate of #1466292: Document all Metatag's hooks.

Is is already possible in some way to make the description and/or keyword fields required?

This issue was closed in favor of #1466292: Document all Metatag's hooks, lets keep the discussion there.