Disable Pinterest Rich Pins for your WordPress site.

disable-rich-pins.php

<?php
/**
 * Plugin Name: Disable Pinterest rich pins.
 * Description: This plugin adds a meta tag to your site header that tells Pinterest to disable rich pins for your WordPress site.
 * Version: 1.0.0
 * Author: Sybre Waaijer
 * Author URI: https://theseoframework.com/
 * License: GPLv3
 */

/**
 * Adds a meta tag to the header that tells Pinterest not to use
 * structured data.
 */
add_action( 'wp_head', function() {
	echo '<meta name="pinterest-rich-pin" content="false" />';
} );