Noooo. First and for most: Regarding any treaty, that concerns matters of armed conflicts, always be extra careful.
Come on. "Times of crisis", "as much assistance as possible". That so ridiculous vague.
How much is "as much as possible"? As much as to deal with the situation at hand? Enough to leave Tempest defenceless?
What's the definition of "crisis" in this context? Monster hordes invading the Kingdom. Yes. Maraudering, murdering mischief maker? Sure. An evil empire first making unreasonable demands as an excuse to later start an invasion? Okay. A not-so-evil nation that started a counter invasion, after being invaded by Brumund in first place. Hey, wait a mo...] Starving citizens, that start roits and threat the nobles? I meant to say threat the nation from within. Heeeey! Sure let the monsters handle it.
If he truly wants humans and "monster" races to interact peacefully, having him giving orders to kill humans is a bad thing. Worst case good ol' Brumund now feels strong enough by being backed up by Tempest to start something. Or another nation feels threatened by the sudden increase of military power, that Tempest represents and seek a preemptive solution for the Tempest problem. This defensive alliance might actually give birth to conflict.
I never took part in any negations for a country, but even I saw the faults of those conditions as soon as I read them. But hey. Lety see it as what it is. A plot device.