e.g. Right-clicking a Barakoa while holding Axe of a Thousand Metals makes it do a swing attack
Right-clicking a Barakoa with food will make the player eat the food (if hungry)
Right-clicking a Barakoa with a potion will make the player drink the potion
Right-clicking a Barakoa with a shield will make the player defend
Right-clicking a Barakoa with a bow will make the player shoot once inventory is closed
Right-clicking a Barakoa with a fishing rod will make the player cast the bobber
Right-clicking a Barakoa with an ender pearl will make the player throw the ender pearl
Right-clicking a Barakoa with an eye of ender will make the player throw the eye of ender
Right-clicking a Barakoa with an empty map will turn it into a map
Right-clicking a Barakoa with an armor piece or elytra will make the player wear it
Right-clicking a Barakoa with a trident will throw the trident
Right-clicking a Barakoa with an egg will throw the egg
Right-clicking a Barakoa with a snowball will throw the snowball
Right-clicking a Barakoa with an Ice Crystal will use it
Right-clicking a Barakoa with Receive Sun's Blessing will use it

etc.