Raheel Shareef must have issued some threats and warnings to him , of hot pursuits and surgical strikes and all that. Ghani is a smart and careful individual, by ordering his forces to carry out operations against TTP in Kunar and Nuristan, he calms down the angry Pakistan which is blaming his country for the attack. But any operation of Afghan forces in kunar would be as "hypocritical" as zarb-e-azb........remember that there are also Afghan Taliban in Kunar and Nuristan, so the operation would not be really against TTP but Afghan Taliban, though in the official statements , it will also speak of targeting TTP just like Pak army was talking about targeting haqqani network even though they were provided safe exits to kurram and Hangu.
chest thumping is not a good thing, we should appreciate Ghani for this not belittle him. By the way in the international politics you dont threaten but request.