Scottish Labour’s parliamentary business manager Rhoda Grant called on Ms Sturgeon to “address the findings of this report and apologise for bending the law to suit her narrow political interests”.
Scottish Green MSP Andy Wightman said: “This is a damning report, and vindicates the complaints of many journalists and researchers that Scottish ministers are slow and inconsistent in how they release information that the public are entitled to.”
The Scottish Government said it would accept the findings of the report in full, and confirmed its internal guidance will be updated with immediate effect.
Joe Fitzpatrick, minister for parliamentary business Joe Fitzpatrick, said: “Being open and transparent is a priority set out in our current Programme for Government.
“We welcomed and cooperated fully with the Scottish Information Commissioner’s review and are happy to accept his recommendations in full to support our continued improvement.
“As the report highlights, we have already implemented a number of changes that have resulted in significant improvements to our FoI performance.
"In the first five months of 2018 we responded to 93 per cent of FoI requests on time, exceeding the 90 per cent target set by the Information Commissioner and a 10% increase on last year.
“Outside the FoI process, last year the Scottish Government responded to over 5,000 queries from journalists in a matter of hours.”