Conciseness

The body is ~46 lines of dense, domain-specific imperative rules ("Never annualize, reconstruct amounts from dates", "Missing amounts are Unavailable, not zero") with no padding and no explanation of concepts Claude already knows. Every token earns its place, matching the lean-and-efficient anchor.

Actionability

Concrete constraints are present ("category=Cost and sub-category=IdleResources", "Pricing basis: <basis>", "If a required file is unavailable, report it and stop the affected flow") giving mostly executable guidance for an instruction-only skill. It stops short of 5 because the actual execution details for each flow are deferred to references rather than specified inline, leaving minor gaps.

Workflow Clarity

A clear sequence is present (read matching references before each flow, read scope-resolution before scoped calls, apply scenario guidance) with an explicit failure checkpoint ("report it and stop the affected flow") and a visible-results gate ("Visibly show results/proposals before dependent questions"). The destructive-operation cap does not apply because the skill is explicitly read-only with deletion-safety prevalidation built in as a core flow, but per-flow step detail lives in references, leaving minor validation gaps versus the anchor for 5.

Progressive Disclosure

The body is a lean overview with a Quick reference table mapping each flow to a specific file; all ten referenced files exist in references/, the anchor link (#read-only-prevalidation) resolves to a real heading, and references are one level deep (siblings plus a README index pointing back to SKILL.md). This matches the anchor for clear overview with well-signaled one-level-deep references.

Specificity

"Analyze Azure Advisor Cost/IdleResources findings and prevalidate deletion safety, including Service Groups" names the domain and exactly two concrete actions, matching the anchor for 1-2 actions that is not comprehensive. It does not reach 4 because the description does not enumerate additional specific actions (e.g., savings reporting, table formatting, lifecycle reports) that the body shows the skill performs.

Completeness

It explicitly answers both what ("Analyze Azure Advisor Cost/IdleResources findings and prevalidate deletion safety") and when (a literal WHEN: clause with concrete trigger phrases), matching the anchor for clearly and explicitly answering both. The routing boundary to azure-advisor further strengthens the when-guidance rather than weakening it.

Trigger Term Quality

The WHEN clause quotes five natural user utterances ("find unused Azure resources", "what resources am I paying for but no longer using", "idle-resource savings", "historical idle-resource savings", "are these idle resources safe to delete") giving good keyword coverage across discovery, savings, and safety intents. It falls short of 5 because common variations like "reduce Azure spend", "Azure waste", or "clean up unused resources" are absent.

Distinctiveness Conflict Risk

The niche is tightly scoped to Azure Advisor Cost/IdleResources findings, and the closing sentence ("Generic Cost, other subcategories, and cross-category requests use azure-advisor") explicitly disambiguates against the sibling skill. Clear niche with distinct triggers and minimal conflict risk, matching the anchor for 5.