Agost purposefully identified Zeke. Thus he wasn't fazed when Alora questioned. Alora might be smart but she was kind of dumb. She might not trust just anybody easily but she needs valid evidence or witness an act firsthand to dislike a person.
So he calmly resolved her suspicion, "Some of the nobles dropped by to meet me in the evening." He let Zeke know he wasn't particularly powerless just because he was in a different kingdom.
However, Alora frowned at those words, "Which nobles have the permission to stroll in the palace during the critical time?"
Since they have no idea what Zand was up to, they wouldn't let anybody just walk around on their wish and scheme anything against the royals. Even the royal guards were specially chosen for the center and eastern palaces.
It wasn't something Agost had to be worried about. So he called out Cyrus who reported the noblemen's names to Alora.