Helen McEntee (Meath East, Fine Gael) | Oireachtas source

The reason is that it might sometimes be necessary for a garda to share information in the course of duty, but where the sharing is crossing a line and is not to deal with a case or is unnecessary, it is a different matter. Someone who is part of a team might have to share the information for very valid purposes. The reason for the reference to a harmful effect is to distinguish between the sharing of information that is clearly not required as part of one's duty or an investigation and the sharing of information that is.