aws-billing-and-cost-management

Analyze AWS costs, find savings, manage budgets, evaluate Savings Plans and Reserved Instances, right-size EC2/Lambda/RDS/EBS with Compute Optimizer, look up service pricing, query CUR with Athena, detect cost anomalies, scope costs to billing views, and monitor Free Tier usage. Triggers on: AWS bill, cost analysis, reduce spend, savings plan, reserved instance, right-size, budget alert, cost optimization, pricing, free tier, cost anomaly, CUR, cost audit, billing view, billing view ARN.

Quality

92%

Does it follow best practices?

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Securityby

Medium

Suggest reviewing before use

Quality

Content

85%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.

The body is a well-structured, actionable overview: a decision-guide table routes to verified reference files, executable CLI examples illustrate common tasks, and two critical rules enforce date and arithmetic correctness. It is concise for its breadth, with only minor redundancy around the deterministic-calculation rule.

Suggestions

The deterministic-calculations rule is stated twice in the body (Critical Rule section and again in the cost-audit task) — consolidate to a single pointer to the reference to tighten conciseness.

Inline the first 'validate -> fix -> retry' loop for one batch workflow (e.g., a Compute Optimizer opt-in check before right-sizing) so workflow_clarity checkpoints are visible without following a reference.

A couple of inline examples embed fixed dates (2026-03-01); add a one-line note that dates must be derived from the current date to avoid the stale-data trap the skill itself warns against.

Dimension	Reasoning	Score
Conciseness	The body is largely lean and assumes Claude's competence (terse CLI snippets, compact tables, a decision guide), with only minor trimming opportunities such as the slightly repetitive Critical Rule framing on deterministic calculations already covered by a reference file.	4 / 5
Actionability	Provides copy-paste-ready, fully executable AWS CLI commands with real flags and JSON filters, plus concrete traps (exclude Credits/Refunds, end date exclusive, us-east-1 for budgets) covering the common cases, matching the fully-executable anchor.	5 / 5
Workflow Clarity	Multi-step processes are sequenced with validation checkpoints (the date-check and deterministic-calculation critical rules act as gates, and the cost-audit workflow is a numbered 7-step process), though the validation feedback loops mostly live in referenced files rather than inline, leaving minor checkpoint gaps in the SKILL.md itself.	4 / 5
Progressive Disclosure	SKILL.md is a concise overview with a decision guide pointing to 14 real, one-level-deep reference files (all present under references/) that are clearly signaled by path, with no nested references, matching the clear-overview-with-well-signaled-one-level-deep-references anchor.	5 / 5
	Total	18 / 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.

The description is exemplary: it enumerates concrete capabilities in third person and supplies an explicit, comprehensive trigger-phrase list, giving Claude a strong basis for both 'what' and 'when' decisions. It is dense but every element earns its place rather than padding.

Dimension	Reasoning	Score
Specificity	Lists multiple concrete actions across the cost-management domain (analyze costs, manage budgets, evaluate Savings Plans/RIs, right-size EC2/Lambda/RDS/EBS, query CUR with Athena, detect anomalies) with comprehensive coverage matching the 'multiple specific concrete actions' anchor.	5 / 5
Completeness	Explicitly answers both 'what' (the listed cost-management capabilities) and 'when' (the 'Triggers on:' clause with concrete trigger phrases), matching the anchor that requires clear answers to both with concrete trigger phrases.	5 / 5
Trigger Term Quality	The explicit 'Triggers on:' clause provides a comprehensive set of natural user phrases and synonyms (AWS bill, reduce spend, savings plan, reserved instance, right-size, budget alert, cost optimization, pricing, free tier, cost anomaly, Cur, cost audit, billing view), matching the comprehensive-coverage-with-synonyms anchor.	5 / 5
Distinctiveness Conflict Risk	Occupies a clear niche (AWS billing/cost management) with highly specific triggers (CUR, billing view ARN, Savings Plans) that are unlikely to fire for unrelated skills, matching the clear-niche-minimal-conflict anchor.	5 / 5
	Total	20 / 20 Passed

Validation

100%

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 — 16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository: aws/agent-toolkit-for-aws
Path: plugins/aws-core/skills/aws-billing-and-cost-management/SKILL.md
Commit: d6ad2e4

Reviewed: 3 days ago

Table of Contents

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