When using this command:

 /give @p wooden_sword 1 0 {ench:[],AttributeModifiers:[{AttributeName:generic.attackSpeed,Name:ATKSp1,Amount:-0.75,Operation:1,UUIDLeast:1,UUIDMost:1},{AttributeName:generic.attackDamage,Name:ATKDa1,Amount:4,Operation:0,UUIDLeast:1,UUIDMost:1}]} 

It will display the attribute again and again for every single inventory place.
It will display:
-When in main hand:
-75% Attack Speed
+4 Attack Damage
-When in off hand: (Despite swords not working)
-75% Attack Speed
+4 Attack Damage
-When on feet:
-75% Attack Speed
+4 Attack Damage
-When on legs:
-75% Attack Speed
+4 Attack Damage
-When on body:
-75% Attack Speed
+4 Attack Damage
-When on head:
-75% Attack Speed
+4 Attack Damage

Even with commands with any attribute, it will always display:
-When in main hand
-When in off hand
-When on feet
-When on legs
-When on body
-When on head