Conciseness

The ~35-line body is lean: a routing table, a one-line scope statement, two short tool paragraphs, a 5-step workflow, and an error table. Nothing explains concepts Claude already knows and every line carries guidance, matching "every token earns its place".

Actionability

Guidance is partially concrete: the commitments row names exact tools ("list_benefit_utilization", "list_reservation_transactions", "get_benefit_recommendations") and rules like "Never transform MCP results in a shell or interpreter" are specific. But the optimization path says only "Cost and Resource Graph tools" with no tool names, and "Validate queries" gives no criterion or method — key execution details are missing, which fits "some concrete guidance but incomplete" rather than the mostly-executable anchor 4.

Workflow Clarity

The numbered workflow gives a clear sequence (confirm scope → load matching workflow → query → separate cost/savings → recommend only) and the Error Handling table provides recovery actions (retry once, report trace ID, state the gap). "Confirm scope, period, currency" and "Validate queries" act as checkpoints but the validation method is left implicit, so it sits at "clear sequence with most checkpoints present; minor validation gaps" rather than the fully explicit anchor 5. No destructive or batch operations exist (recommendations only), so the cap at 3 does not apply.

Progressive Disclosure

The Quick Reference table cleanly routes each intent to a one-level reference (optimization.md, commitments.md) plus a tool-fallback mapping, and optimization.md links its own sub-references (resource-graph.md, report-template.md, services/*.md). Structure is good, but navigation reaches two levels deep (SKILL.md → optimization.md → services/redis.md) and the services files are not surfaced in SKILL.md, which is a minor organization gap against the one-level-deep top anchor.

Specificity

The opening sentence names the domain and only two actions — "Optimize existing Azure resources and analyze Reservations or Savings Plans" — and "optimize" is itself generic. Concrete operations like rightsize or find idle resources appear only as quoted trigger phrases rather than stated capabilities, so coverage is not comprehensive enough for a 4 ("Lists several specific actions"). It is clearly above a 2, where actions are minimal or generic with no domain naming.

Completeness

It explicitly answers both questions: the first sentence states what the skill does, "WHEN:" followed by eleven concrete trigger phrases states when to use it, and "DO NOT USE FOR: cost spikes, forecasts, pricing estimates, budgets, or governance" adds explicit exclusions. This meets the top anchor (clear what AND when with concrete trigger phrases); a 4 would have a less explicit when-clause.

Trigger Term Quality

Trigger coverage is comprehensive and natural: "optimize Azure costs", "reduce cloud spending", "rightsize resources", "find idle resources", "orphaned disk", "deleted VM still charged", "public IP still charging", "reservation utilization", "Savings Plan coverage", "why is pay-as-you-go still charged". These span synonyms, symptom-phrasings users actually say, and product-specific terms; nothing common is missing, matching the top anchor.

Distinctiveness Conflict Risk

Azure cost optimization with Reservations/Savings Plans is a clear niche with distinct triggers, and the DO-NOT-USE list explicitly fences off adjacent domains (spikes, forecasts, pricing, budgets, governance). Conflict risk with other cost or cloud skills is minimal.