Conciseness

Mostly efficient, Amplitude-specific guidance, but there is noticeable tightening to do: the 'Known Pitfalls' section substantially repeats pitfalls already given per workflow (internal vs application user IDs, millisecond timestamps), and 'When to Use' ('This skill is applicable to execute the workflow or actions described in the overview.') plus the first 'Limitations' bullets are boilerplate filler. It does not fall to 2 because the core content (tool sequences, parameters, ID resolution patterns) earns its tokens with little explanation of concepts Claude already knows.

Actionability

Concrete, executable guidance throughout: exact tool slugs, numbered tool sequences, named parameters, a JSON example for user_properties operations, and an explicit async polling pattern — matching anchor 4 ('mostly executable guidance; concrete code or commands with minor gaps'). Not 5 because some details are left vague ('check schema for maximum events per request', 'Extract Amplitude's internal user ID from response' without naming the response field).

Workflow Clarity

Sequences are clearly listed and some validation exists (confirm connection ACTIVE before workflows; CHECK_COHORT_STATUS polling loop), but the batch event-ingestion workflow — a permanent, batch operation — has no verification/feedback step ('successful API response does not mean data is immediately queryable' is noted without a follow-up check). Per the judging guidelines, missing validation in batch operations caps workflow clarity at 3; the cap keeps it from 4 despite otherwise strong sequencing.

Progressive Disclosure

Section structure is clear (Prerequisites, Setup, Core Workflows, Common Patterns, Quick Reference), but the ~220-line body inlines a per-tool parameter and pitfall reference that could live in separate reference files, and there are no external references at all — matching anchor 3 ('content that should be separate is inline'). Not 4 because the bulk of the body is API-reference material rather than a lean overview, and not 2 because sections are well-organized and navigable.

Specificity

The description lists several concrete capability areas — 'events, user activity, cohorts, user identification' — anchored to the Amplitude domain, matching anchor 4 ('lists several specific actions; minor gaps in coverage'). It falls short of 5 because items are noun lists rather than explicit actions and coverage has gaps (e.g., event categories, cohort membership updates), and exceeds 3 because it names more than 1-2 concrete items.

Completeness

It has a clear 'what' ('Automate Amplitude tasks via Rube MCP (Composio): events, user activity, cohorts, user identification') but no 'Use when...' clause or equivalent explicit trigger guidance, which per the judging guidelines caps completeness at 3. It is not 4/5 because the 'when' is entirely missing rather than merely under-specified.

Trigger Term Quality

'Amplitude', 'events', 'user activity', 'cohorts', and 'user identification' are phrases users would naturally say, matching anchor 4 ('good keyword coverage; a few natural terms missing'). Not 5 because common synonyms and variations like 'product analytics', 'tracking', 'user properties', or 'segments' are absent; not 3 because the included terms go beyond a minimal keyword set.

Distinctiveness Conflict Risk

The description is tightly scoped to 'Amplitude tasks via Rube MCP (Composio)', a clear niche with distinct triggers and minimal conflict risk with other skills, matching anchor 5. Neighboring anchor 4 ('mostly distinct; minor overlap risk') fits less well since no other common skill would claim these triggers.