Item with CanDestroy sign doesn't work on sign, and show it (screenshot).
Command:
/give @p minecraft:wooden_axe 1 59 {CanDestroy:["minecraft:sign"]}
MC-74034
CanDestroy minecraft:sign doesn't work [Cancel/Error]
Resolved
Invalid
0
it's minecraft:standing_sign or minecraft:wall_sign for the blocks
minecraft:sign is the item
invalid