I just added Boards Manager install support for HoodLoader2 v2.0.5. This version requires Arduino IDE 1.6.6 and the author asked me if there is any way to specify the required IDE version. I don't see any way to do this with the toolsDepencies system but maybe there is something I've overlooked?
If there is currently no way to do this I've been asked to submit a feature request for this functionality. My idea is to add a new field to the JSON file that specifies the range of compatible IDE versions and if the current IDE version isn't in that range then Boards Manager installation is disabled with a note of which IDE version is required and a link to the Arduino download page. Any input on how you would like to see this implemented?