Information about the harm caused by the SkyCity convention centre deal was withheld because it was considered commercially sensitive to the casino firm, official papers show.
The papers show the office of Minister Steven Joyce sought greater disclosure on the harm caused by gambling than officials made public.
"The Harm stuff looks a bit light. Is there no more on that?" the minister's office was quoted as asking, according to papers released under the Official Information Act.
They stemmed from the officials' efforts to proactively release information relating to the controversial cash-for-pokies deal, which will involve the Government changing the law in return for SkyCity building a $400 million International Convention Centre next to its Auckland casino. The law change will let the casino increase the opportunities to gamble.
The Herald sought the officials' deliberations, which included consultation with Mr Joyce's office over what was being released.