The description of the ghostwise halfling's Silent Speech trait (SCAG, p. 110) says:
You can speak telepathically to any creature within 30 feet of you. The creature understands you only if the two of you share a language. You can speak telepathically in this way to one creature at a time.
If I am understanding that correctly as written, it only allows the Halfling to speak to the target (not with) and does not allow for a telepathic reply. Is that correct?
If that is the case, it is definitely different than similar things like the Message or Telepathy spells…
Best Answer
Correct, it doesn't specify it allows two-way communication.
Other items in the game, like Telepathic Bond states the targets can communicate. With this spell stating "targets" it implies that both creatures affected can communicate to the other. Since the Ghostwise Halfling does not specify this then it would not have two-way communication.