Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safe read-only nature is covered. The description adds useful detail about the payload scope (profile, attachments, summary, activity history), which helps the agent understand what the workspace includes, but it does not disclose other behaviors such as default activity limit or whether the contact must be private.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.