Accept the offer for trade

As you told Dietrich, your country needed the trade route in order to increase its wealth, and by extension, the people's prosperity. Prosperous people would be more inclined to be grateful and supportive of your regime, which is then free to do whatever is required to increase the country's wealth.

The technological and knowledge sharing with Axum could be useful as well, since you needed skilled workers to improve the livelihood of the people. Perhaps they possessed new weapons and tactics that could increase the strength of your military.

According to your information, Axum, the country where Eyoab came from is bigger, but situated far away to be able to politically and diplomatically influence your country. As for the noblewoman, she wouldn't have any bearing on your policy, if you decide to accept her as your wife, or mistress, since the alliance will be on paper only.

With that in mind, you quickly settle on one of the first few things you require out of the deal.