Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations declare readOnlyHint=false but destructiveHint=false, which alone could confuse an agent; the description resolves this by stating the CRSProf supplies all course/profile/plan data and options are presentation-only overrides, i.e. nothing in the plan is altered. It still says nothing about where the file is written, auth needs, or repeat-run behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.