public function get_item_schema() {

		// Get schema from the membership endpoint.
		$schema = $this->invites_endpoint->get_item_schema();

		// Set title to this endpoint.
		$schema['title'] = 'bp_group_membership_request';

		// Adapt some item schema property descriptions to this endpoint.
		$schema['properties']['user_id']['description']  = __( 'The ID of the user who requested a Group membership.', 'buddypress' );
		$schema['properties']['group_id']['description'] = __( 'The ID of the group the user requested a membership for.', 'buddypress' );
		$schema['properties']['type']['default']         = 'request';

		// Remove unused properties.
		unset( $schema['properties']['invite_sent'], $schema['properties']['inviter_id'] );

		/**
		 * Filters the group membership request schema.
		 *
		 * @param array $schema The endpoint schema.
		 */
		return apply_filters( 'bp_rest_group_membership_requests_schema', $this->add_additional_fields_schema( $schema ) );
	}