PHP8 undefined array key "description"

Problem/Motivation

Some plugins don't have a description, as example, OgCountryName of metatag_open_graph submodule. When you visit a metatag plugins report page it generates warnings in logs when a site uses php8

Warning: Undefined array key "description" in Drupal\metatag\Controller\MetatagController->reportPlugins() (line 120 of

Steps to reproduce

Use php8, install a metatag_open_graph submodule and visit plugins report page /reports/metatag-plugins

Proposed resolution

Add a description key checking in MetatagController on line 120.

$row['description'] = [
  'data' => [
    '#markup' => isset($definition['description']) ? $definition['description'] : '',
  ],
  'colspan' => 8,
];

And/or add a proper description to all annotations of meta tag plugins.