Conciseness

Lean and efficient throughout — it assumes Claude's competence, never explains scheduling concepts Claude already knows, and every line (tools, workflow, heuristics, output defaults) earns its place, matching the level-3 anchor.

Actionability

Names concrete tools (get_availability, search_events, read_event, search_events_all_fields), gives a numbered workflow with specific grounding fields, and fixes output defaults (2-4 slots); per the instruction-only scoring note, the absence of code is not penalized because the guidance is specific and actionable.

Workflow Clarity

A clearly sequenced 7-step process with explicit decision branches (step 6 'If no perfect slot exists... return the best compromise and state exactly who is impacted'; step 7 room-check ordering); the operation is non-destructive/non-batch so the missing-validation cap at 2 does not apply, and the fallback logic provides the equivalent of error-recovery branching.

Progressive Disclosure

Under 50 lines with no need for external references (bundle contains only icon/logo assets, and the body references no other files) and well-organized into Relevant Actions, Workflow, Ranking Heuristics, and Output Conventions sections, qualifying for the level-3 simple-skill allowance.

Specificity

Names multiple concrete actions — 'Find and rank good meeting times', 'compare candidate slots across several attendees', 'find the best compromise time', 'add a room check' — matching the level-3 anchor of listing several specific actions rather than vague domain reference.

Completeness

Clearly answers both what ('Find and rank good meeting times...') and when via an explicit 'Use when the user wants to schedule a group meeting...' clause, satisfying the level-3 anchor and avoiding the missing-trigger cap at 2.

Trigger Term Quality

Triggers use natural phrasing a user would say ('schedule a group meeting', 'compare candidate slots', 'find the best compromise time', 'add a room check') with good coverage of common variations, beyond the partial level-2 anchor.

Distinctiveness Conflict Risk

A clear niche (group meeting scheduling via Google Calendar data) with distinct, specific triggers makes overlap with other skills unlikely, matching the level-3 'clear niche with distinct triggers' anchor rather than the generic level-2.