Conciseness

The ~30-line body is pure routing: no explanations of concepts Claude already knows, no padding, and every line directs action. The per-reference coverage summaries ("Covers IAM role policies (inline + attached managed), S3 bucket policies...") function as navigation signals rather than duplicated content, matching anchor 5's 'every token earns its place'.

Actionability

Concrete decision guidance ("Access denied or permission error? → See [permission debugging procedure](references/permission-debugging.md)") routes each symptom to a specific executable procedure, but the body itself contains no commands, parameter-gathering, or verification steps — those live entirely in the reference files. Fits anchor 4 (mostly executable guidance, minor gaps) better than 5.

Workflow Clarity

The workflow ("Determine the failure type" then two symptom-keyed branches) is clear and unambiguous for the covered cases, and the referenced procedures contain validation steps. Not 5 because there is no fallback guidance for failure types outside the two branches (e.g., an issue that is neither an access error nor a logging problem).

Progressive Disclosure

The body is a lean overview with two clearly signaled references that are exactly one level deep (verified against the actual bundle: both files exist, are substantive, and contain only external AWS doc links, no nested .md references), plus a separate external-resources section. Matches anchor 5; not 4, since navigation is unambiguous and content is appropriately split.

Specificity

The description names the domain and specific issue areas comprehensively ("IAM roles, S3 bucket policies, KMS keys, Lake Formation permissions, and CloudWatch logging"), but the action verbs are limited to two near-synonyms ("Troubleshoots and debugs"), falling just short of anchor 5's multiple distinct concrete actions.

Completeness

It clearly answers what ("Troubleshoots and debugs AWS Clean Rooms collaboration issues related to...") and explicitly answers when with concrete trigger phrases ("Use when a customer reports permission failures, access errors, or log publishing issues in Clean Rooms"), matching anchor 5. Not 4, because the 'when' clause is explicit and specific rather than improvable.

Trigger Term Quality

"permission failures, access errors, or log publishing issues" are natural phrases a user would report, giving good keyword coverage, but common variations like "access denied", "not authorized", or specific error messages are missing. Fits anchor 4 better than 3 (coverage is genuinely good, not just 'some relevant keywords') and better than 5 (synonym coverage is incomplete).

Distinctiveness Conflict Risk

It occupies a clear niche (AWS Clean Rooms) with service-specific triggers scoped by "in Clean Rooms", giving minimal conflict risk with broader AWS IAM/S3 debugging skills. Matches anchor 5; not 4, since the trigger clause explicitly scopes activation to this service.