Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden. 'Read' implies a non-mutating operation and the macOS scoping hints at platform requirements, but there is no disclosure of permission/accessibility requirements, behavior in headless or SSH contexts, or what happens when the clipboard is empty or holds non-text data.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.