Conciseness

The body is dense and operational — a symptom-to-category table, copy-paste CLI commands, and no explanation of concepts Claude already knows. Minor trimming is possible: the IAM enforcement caveat ("IAM authorization is only enforced when a file system policy exists...") appears nearly verbatim in both Category C and Security Considerations.

Actionability

Most sections give executable, copy-paste AWS CLI commands with explicit expected outcomes (e.g., "nc -zv fs-ID.efs.REGION.amazonaws.com 2049", the CloudWatch BurstCreditBalance query). It falls short of anchor 5 because Category E offers only console-level directions ("Verify key is enabled in KMS console", "Verify EFS service-linked role has KMS permissions") with no commands, and the POSIX section is thin.

Workflow Clarity

A clear diagnostic pipeline exists: dependency verification, symptom-to-category classification table, then per-category steps with embedded checkpoints (connectivity test with nc, "Both MUST be true" for DNS attributes, PercentIOLimit threshold guidance) and confirmation gates for mutating commands. It is not anchor 5 because there is no re-validation after applying fixes (e.g., re-run nc after authorizing ingress) and the Category B numbered list mis-sequences (two consecutive '1.' items).

Progressive Disclosure

No bundle files exist, and the ~170-line runbook is well-sectioned (Overview, Common Tasks by category, Troubleshooting, Security Considerations, Additional Resources) with deep material delegated to official AWS doc links. Minor gaps keep it from anchor 5: the category deep-dives could live in per-category reference files, and the Additional Resources links duplicate the Overview link.

Specificity

"Diagnoses and resolves Amazon EFS issues including mount failures, NFS timeouts, permission errors, throughput problems, and burst credit exhaustion" comprehensively enumerates concrete problem classes, but the actions themselves are limited to two generic verbs ("Diagnoses and resolves"), so it falls just below the anchor-5 requirement of multiple specific concrete actions.

Completeness

It clearly answers "what" ("Diagnoses and resolves Amazon EFS issues including mount failures, NFS timeouts, permission errors, throughput problems, and burst credit exhaustion") and "when" with concrete trigger phrases ("not mounting, returning errors, performing slowly, or showing access denied"), matching the anchor-5 example structure. It is not score 4 because the 'when' clause is explicit and enumerates specific symptoms rather than being merely serviceable.

Trigger Term Quality

"Use when the user has an EFS file system that is not mounting, returning errors, performing slowly, or showing access denied" covers natural phrasings users would say, plus keywords like "NFS timeouts" and "burst credit exhaustion". A few common variations (e.g., "EFS mount fails", "can't mount EFS", "efs-utils") are missing, keeping it below comprehensive synonym coverage.

Distinctiveness Conflict Risk

The niche is clearly staked out as "Amazon EFS" with symptom-specific triggers (mount failures, burst credit exhaustion), which a generic NFS, Linux mount, or storage skill would not claim. Minor overlap with general NFS troubleshooting exists but triggers are EFS-anchored, matching the anchor-5 'clear niche with distinct triggers'.