Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It usefully discloses the matching behavior (exact id vs. title prefix), but omits key behavioral traits: whether the caller must be the one who claimed the quest, what happens if the quest was never claimed, and how ambiguity is handled when a title prefix matches multiple quests.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.