In preparation for today's testimony, I looked at exactly those items.
The ICAO list provides illustrations, very much like the Transport Canada list. ICAO allows knives under 2.5 inches on board aircraft. We do not allow any knives, because Transport Canada did a threat/risk assessment that said no. So we're already not in harmony with ICAO because we think the ICAO rules are too loose.
The U.S. allows scissors of up to four inches in length from the fulcrum and tools of up to seven inches. We only allow six centimetres, because our threat risk assessment determined that the U.S. rule was too dangerous.
Restraining devices appear to be allowed by ICAO and the European Union, but the good old Australians don't think handcuffs should be on board.