Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, openWorldHint=true, destructiveHint=false, so safety profile is covered. Description adds the 'editable' and 'Morning' context, which is useful, but omits pagination behavior, result sorting, and whether it searches by content or metadata. With annotations carrying the main burden, a 3 is appropriate.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.