Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. While 'Affiche' (displays) implies a read-only operation, it doesn't specify whether this requires authentication, what format the statistics are returned in, if there are rate limits, or if the data is real-time versus cached. For a stats tool with zero annotation coverage, this is insufficient.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.