Conciseness

The body is a terse catalog of facts Claude cannot reliably recall from pre-training ('Instance profiles: waiter + `time.sleep(10)` pattern', 'Managed policy max versions: 5') with zero padding or explanation of known IAM concepts, and exactly one JSON example where the detail is required. Every line carries a non-obvious verified fact, matching the 'every token earns its place' anchor.

Actionability

It provides a complete, copy-paste-ready JSON policy demonstrating the ForAllValues + Null pattern, an exact CLI command ('aws organizations list-available-policy-types'), exact exception and method names ('DuplicatePolicyAttachmentException', 'activate()'), and concrete fixes ('use ForAnyValue:StringEqualsIgnoreCase', 'Scope Resource to specific role ARNs or an IAM path'). The guidance is fully executable across the common cases.

Workflow Clarity

Routing conditions are unambiguous ('Read [references/aws-iam-role-management.md] if the user needs to create, scope, or maintain IAM roles', a MUST directive for policy generation) and a global verification checkpoint is mandated ('verify specific claims... against official AWS documentation rather than relying on pre-training'). However, the body contains no explicit validation feedback loops or step sequences for the workflows it routes to — those live in the reference files — so it fits 'clear sequence with most checkpoints present; minor validation gaps' rather than anchor 5.

Progressive Disclosure

The body (~92 lines) keeps terse high-value corrections inline by design and defers deeper patterns to real, one-level-deep reference files ('See [references/common-pitfalls.md]'), each signaled with explicit read conditions. All referenced paths resolve to actual files in the bundle, and cross-links between references are lateral with no nesting chains, giving easy navigation and an appropriately split structure.

Specificity

The description lists multiple concrete capabilities — 'verified corrections for IAM behaviors', 'structured workflows for IAM role management', 'baseline policy generation from application source code or a Terraform plan JSON', 'service role creation... with aws:SourceAccount/aws:SourceArn trust conditions' — with named condition operators, AWS services, and trust condition keys. Coverage within the IAM domain is comprehensive, matching the anchor-5 example rather than the 'minor gaps' of anchor 4.

Completeness

It explicitly answers both 'what' (verified corrections, role management workflows, policy generation, named coverage areas) and 'when' ('Applies when creating IAM roles, writing IAM or bucket policies... or any task needing a service or execution role') with concrete trigger phrases, plus explicit exclusions ('Does not cover non-IAM authorization like Cognito user-pool policies or app-level RBAC').

Trigger Term Quality

The trigger clause covers strong natural terms — 'creating IAM roles, writing IAM or bucket policies, generating policies from application source code or a Terraform plan JSON, working with STS, Organizations, or condition operators, or any task needing a service or execution role' — but a few natural synonyms users would say are absent (e.g., 'pass role', 'assume role', 'trust policy' as triggers). This fits 'good keyword coverage; a few natural terms missing' rather than the comprehensive synonym coverage of anchor 5.

Distinctiveness Conflict Risk

It occupies a clear AWS IAM niche with distinct, technical trigger vocabulary and explicit non-goals, so overlap with other skills is minimal — matching the 'clear niche with distinct triggers' anchor.