I found that line quite interesting. The wording seems to imply that someone is going to read this tablet to Ea-nasir, and possibly that someone wrote the tablet on behalf of Nanni. In an age before near-universal literacy (i.e. most of human history), that makes sense: Ea-nasir would have summoned someone to read out the tablet. Given Ea-nasir's position as a presumably well-off trader, he may have simply had a scribe on-staff to handle his correspondence--an early instance of the modern PR hack?

well into the early modern era, letters were written as if they were speech.

this explains the three paragraphs of flowery hellos at the opening of most old letters — it’s written as if the writer is standing in front of the reader and speaking.