public function get_item_collection_params() {
		$params                       = parent::get_collection_params();
		$params['context']['default'] = 'view';

		// Removing unused params.
		unset( $params['search'], $params['page'], $params['per_page'] );

		$params['html'] = array(
			'description'       => __( 'Whether to return an <img> HTML element, vs a raw URL to an avatar.', 'buddypress' ),
			'default'           => false,
			'type'              => 'boolean',
			'sanitize_callback' => 'rest_sanitize_boolean',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['alt'] = array(
			'description'       => __( 'The alt attribute for the <img> element.', 'buddypress' ),
			'default'           => '',
			'type'              => 'string',
			'sanitize_callback' => 'sanitize_text_field',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['no_grav'] = array(
			'description'       => __( 'Whether to disable the default Gravatar fallback.', 'buddypress' ),
			'default'           => false,
			'type'              => 'boolean',
			'sanitize_callback' => 'rest_sanitize_boolean',
			'validate_callback' => 'rest_validate_request_arg',
		);

		/**
		 * Filters the item collection query params.
		 *
		 * @param array $params Query params.
		 */
		return apply_filters( 'bp_rest_attachments_member_avatar_collection_params', $params );
	}