Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden; it does usefully disclose the shape of the response (dates, price band, lot size, registrar, status URL, phase, listing-day gains), which tells the agent this is a rich read. However, it says nothing about fuzzy fragment matching behavior — what happens with ambiguous or zero matches — nor about data freshness or whether the call is rate limited.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.