s3

AWS S3 object storage for bucket management, object operations, and access control. Use when creating buckets, uploading files, configuring lifecycle policies, setting up static websites, managing permissions, or implementing cross-region replication.

0.97x

Quality

86%

Does it follow best practices?

Impact

96%

0.97x

Average score across 3 eval scenarios

Securityby

Passed

No findings from the security scan

Quality

Content

72%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

A highly actionable, well-structured reference for common S3 operations, rich in executable CLI and boto3 examples. Its weaknesses are structural: it is monolithic with no progressive disclosure to bundle files, and its destructive/batch workflows lack validation checkpoints.

Suggestions

Add explicit validation steps to risky workflows — e.g., after 'aws s3 sync --delete' run a listing/dry-run diff to confirm intended deletions before applying, and verify lifecycle policies with get-bucket-lifecycle-configuration before relying on them.

Split the CLI Reference tables and detailed pattern code into reference files under references/ (e.g., CLI_REFERENCE.md, PATTERNS.md) and keep SKILL.md as a concise overview that links one level deep, improving progressive disclosure.

Remove or condense the Core Concepts definitions (buckets, objects, versioning) and the durability/intro paragraph, which restate AWS knowledge Claude already has, to tighten token efficiency.

Dimension	Reasoning	Score
Conciseness	Mostly efficient reference material (code blocks, command tables), but the intro paragraph and the Core Concepts definitions of buckets/objects/versioning restate concepts Claude already knows; trimming those would reach the lean anchor. Not a 3 because the bulk is actionable, not explanatory padding.	4 / 5
Actionability	Abundant copy-paste-ready code and commands — AWS CLI snippets, boto3 scripts, lifecycle/CORS JSON, troubleshooting debug commands — covering the common cases, matching the fully-executable anchor.	5 / 5
Workflow Clarity	Sequences exist (create-bucket then versioning, block-public-access, encryption) but there are no explicit validation checkpoints, and destructive/batch operations like 'aws s3 sync --delete' and lifecycle deletions lack verification steps — triggering the cap that holds this dimension at 3.	3 / 5
Progressive Disclosure	Well-organized with a TOC and clear sections, but it is a single ~340-line SKILL.md with everything inlined (CLI reference tables, full code patterns); no bundle files exist and nothing is split out to references, matching the 'content that should be separate is inline' anchor. Not a 4 because SKILL.md is the whole payload rather than an overview pointing to detailed materials.	3 / 5
	Total	15 / 20 Passed

Description

100%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A strong, third-person description that explicitly pairs capabilities with a 'Use when' trigger clause covering a broad range of S3 tasks. It is comprehensive, distinct, and free of vague fluff or over-claims.

Dimension	Reasoning	Score
Specificity	Lists multiple concrete actions across both capability and trigger framings — 'bucket management, object operations, and access control' and 'creating buckets, uploading files, configuring lifecycle policies, setting up static websites, managing permissions, or implementing cross-region replication' — matching the comprehensive-coverage anchor.	5 / 5
Completeness	Explicitly answers 'what' ('AWS S3 object storage for bucket management, object operations, and access control') and 'when' ('Use when creating buckets, uploading files, ...') with concrete trigger phrases, matching the top anchor.	5 / 5
Trigger Term Quality	Covers natural phrases users would actually say ('creating buckets', 'uploading files', 'lifecycle policies', 'static websites', 'cross-region replication') comprehensively; file extensions are not applicable to S3, so the synonym/extension bar is effectively met.	5 / 5
Distinctiveness Conflict Risk	'AWS S3' carves a clear niche with S3-specific triggers (buckets, presigned URLs, lifecycle) unlikely to fire for unrelated skills, matching the minimal-conflict anchor.	5 / 5
	Total	20 / 20 Passed

Validation

93%

Warnings & errors only

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 15 / 16 Passed

Validation for skill structure

Criteria	Description	Result
frontmatter_unknown_keys	Unknown frontmatter key(s) found; consider removing or moving to metadata	Warning

	Total	15 / 16 Passed

Repository: itsmostafa/aws-agent-skills
Path: skills/s3/SKILL.md
Commit: e786d25

Reviewed: 2 days ago

Table of Contents

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