The body is dense and table-driven (symptom→category) with terse category sections and direct commands; it never explains concepts Claude already knows, so every token earns its place.

It provides fully executable, copy-paste-ready commands (e.g. "aws s3files list-mount-targets --file-system-id fs-ID --region REGION", "aws ec2 modify-vpc-attribute --vpc-id vpc-ID --enable-dns-support Value=true") plus error→fix tables, matching the level-3 anchor.

A clear classify-then-act sequence is fronted by a "Verify Dependencies" step with explicit validation (check tool existence, MUST NOT run destructive commands, inform user if missing, await confirmation on writes), so the destructive/mutating context is not left without checkpoints.

No bundle files exist and the only references are well-signaled, one-level-deep external AWS documentation links; the content is organized into clean sections, which per the scoring notes earns a 3 for a self-contained skill with no need for external references.

"Diagnoses and resolves Amazon S3 Files issues including mount failures, permission errors, synchronization problems, and performance issues" lists multiple specific concrete actions, matching the level-3 anchor rather than the level-2 single-domain example.

It explicitly answers both what (diagnoses and resolves S3 Files issues) and when ("Use when the user has an S3 file system that is not mounting...") with explicit triggers, so it is not capped at 2.

Natural user phrasings like "not mounting", "returning access denied", "not syncing changes to S3", "showing files in lost+found", and "performing slower than expected" give good coverage of terms a user would actually say.

Scoped tightly to "Amazon S3 Files" with distinct symptom triggers, making it unlikely to fire for unrelated file-system or S3 skills.