The description lists specific concrete actions: 'Move a Google Calendar event to a new time' and 'automatically notify all attendees.' These are clear, actionable capabilities.

The 'what' is clearly stated (move a calendar event and notify attendees), but there is no explicit 'Use when...' clause or trigger guidance for when Claude should select this skill. Per rubric guidelines, this caps completeness at 2.

Includes natural terms like 'Google Calendar', 'event', 'new time', and 'attendees', but misses common variations users might say such as 'reschedule', 'meeting', 'calendar invite', or 'change time'.

The description targets a very specific niche—moving Google Calendar events with attendee notification—which is unlikely to conflict with other skills. The combination of Google Calendar + moving events + attendee notification is highly distinctive.

Very lean and efficient. The prerequisite note is necessary, the description is one line, and the steps are concrete commands with no unnecessary explanation of what Google Calendar is or how APIs work.

Provides fully executable, copy-paste ready CLI commands for each step with specific flags and JSON payloads. The example includes concrete parameter structures including sendUpdates, timeZone, and date formats.

Steps are clearly sequenced (find → get details → update), but there's no validation checkpoint after the patch operation (e.g., verify the event was updated correctly, confirm attendees were notified) and no error recovery guidance for a potentially disruptive operation (rescheduling affects all attendees).

For a simple, single-purpose skill under 50 lines, the content is well-organized with a clear prerequisite callout, a brief description, and a concise numbered workflow. No need for external references given the scope.