Matirin is barely paying attention; he wants a read on the other ship but they haven't seen anything since it jumped in, which is totally unsurprising; almost anyone on either side would've chosen to jump in far enough out that their ship could evade most sensor detection. Only one jump, so not an arriving fleet - unless it's a scout for one -
If it's Yeerks they have to run, the ship is still in no shape to fight. If it's Andalites - they're not going to believe him, but if he can get them not to shoot down the Pool ship for long enough to explain the rest -
<Message the Pool ship. Ask if they have the capabilities to jump-to-hyperspace, communicate that we won't take it as hostile in light of uncertainty about who showed up ->
Someone does this. The Pool ship doesn't respond immediately, maybe checking its orders.
<And...ask the new ship to identify itself, in a rotation of ten languages known to be spoken in this region by z-space-capable civilizations, including ours and theirs ->
The response will be at least twenty minutes in coming, based on where the jump location was. He watches the mages evacuate and paces and tries to think.