Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral burden. It discloses that this is a direct zero-copy LMDB read and that records are decoded via SchemaDictionary, which usefully implies a read-only, non-mutating operation, but it does not explicitly state side effects, permissions, failure behavior, or consistency guarantees.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.