how to get meta description value for schema

Hello. I need to get value of content in meta description to display it in schema code
https://freeimage.host/i/HcA38Rp
what code I can replace with <?php the_excerpt(); ?> to display right descriotion as in above image?

      "@context": "https://schema.org",
      "@type": "NewsArticle",
      "mainEntityOfPage": {
        "@type": "WebPage",
        "@id": "https://google.com/article"
      }, 
      "headline": "<?php the_title(); ?>",
	  "description": "<?php the_excerpt(); ?>",
      "image": "<?php if(get_post_meta($post->ID, 'echo_featured_img', true)) { $img = get_post_meta($post->ID, 'echo_featured_img', true); echo $img; } if(get_post_meta($post->ID, 'echo_featured_img2', true)) {$img2 = get_post_meta($post->ID, 'echo_featured_img2', true); echo $img2; }?>",
      "datePublished": "<?php the_date('Y/m/d'); ?>",
      "dateModified": "<?php the_modified_time('Y/m/d'); ?>",
      "author": {
        "@type": "Person",
        "name": "<?php the_author(); ?>",
        "url": "<?php echo get_author_posts_url( get_the_author_meta( 'ID' ), get_the_author_meta( 'user_nicename' ) ); ?>"
      },
      "publisher": {
        "@type": "Organization",
        "name": "Akhbarejadid",
        "logo": {
          "@type": "ImageObject",
          "url": "https://akhbarejadid.com/wp-content/uploads/2021/05/logoakhbarejadid.png"
        }
      }
    }