What does Hermes use his wand for in book 5 of The Odyssey?

When Zeus commands Hermes to visit Calypso and relay the command to let Odysseus go, Hermes gets ready to set out at once. “He took the wand with which he puts to sleep / or wakes the eyes of any man he chooses.” It is an important tool for completing his messenger errands. This is evident to Calypso when she greets Hermes upon his arrival because she immediately asks him, “Hermes, my honoured and welcome guest, / why have you come here with your golden wand?” She sees the wand almost as a threat.
When Hermes reveals that Zeus has ordered her to send Odysseus off, she complains that the gods are envious that a she and a mortal man cherish each other. However, Calypso realizes that no one can resist an order from Zeus, so she agrees to give Odysseus up. Hermes’ reply is “Yes, send him away. / Think of Zeus's rage. He may get angry / and make things hard for you in days to come.” With this veiled threat, he leaves, and Calypso keeps her word, sending the reluctant Odysseus off with advice to help him reach home.
Although we never actively see Hermes use his wand, the role it plays in this scene is unmistakable. We are told that Hermes can use it to “wake” any man, and Odysseus has surely been asleep to his true goal and purpose while on Ogygia under Calypso’s influence. Hermes himself never even meets with Odysseus, yet he accomplishes Zeus’s task. All he needs to do, it seems, is let Calypso get sight of that wand, so she follows the order. She knows that with the wand, Hermes can make it happen anyway. Perhaps she would rather send Odysseus off of her own accord, rather than have him taken from her.
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