Question About Survival-Utility and Sidebar Placement

Is there any pattern to which skills can go on the sidebar? I was thinking that the Survival-Utility skills were the ones that were allowed to be placed there, but not all of them can. Flesh to Fuel can be placed on the sidebar, but Look At My Hammer cannot.

I was not sure if this was intended or a bug. No one in game seemed to know, so I thought I would ask here.

Can anyone explain which skills are intended to be allowed to go on the sidebar? Is it just whichever ones the developers specifically designate? Or is there a pattern and Look At My Hammer got missed?

I think it's just the ones the developer designates.

Flesh to Fuel is the only side-bar-able survival utility power, as far as I can remember; it's one of the perks of the Fire Magic skill.

If you read each spell, it will say if it can be on the side bar, if it doesnt mention it, then it cant. Most of the ones that can go on the sidebar are in the list when right clicking sidebar and picking special abilities.