Conciseness

The body is lean and efficient with no padding or explanation of concepts Claude already knows; every line (tool name, one-line purpose, executable command, parameter table) earns its place.

Actionability

Copy-paste-ready bash commands with concrete example arguments plus a full parameter table give fully executable guidance covering the common filtering cases.

Workflow Clarity

The Guidelines give a clear two-step sequence (board_list first to get IDs, then task_list with filters) with an explicit dependency; it stays at 4 rather than 5 because no error/output-handling checkpoint is spelled out, though none is strictly required for read-only queries.

Progressive Disclosure

Under 50 lines with no need for external references, the content is organized into clear sections (board_list, task_list, Guidelines) satisfying the simple-skill exception for a top score.

Specificity

The description names the domain ('Kanban board and task query expert') but the only action verb is the generic 'query', so actions are minimal rather than comprehensive — matching the score-2 anchor more closely than score 3's '1-2 concrete actions'.

Completeness

It answers both what ('Kanban board and task query expert') and when ('ALWAYS invoke this skill when the user asks about boards, tasks, task status, or project progress'), with an explicit trigger clause; the 'what' is terse enough to keep it just below a 5.

Trigger Term Quality

Natural terms 'boards, tasks, task status, project progress' are phrases users would actually say, giving good keyword coverage, though a few synonyms or variations are missing.

Distinctiveness Conflict Risk

The kanban/task niche with explicit triggers is mostly distinct with only minor overlap risk against general project-management skills, fitting the score-4 anchor.