Conciseness

The body is lean and assumes competence — 'The environment automatically reports what is on/in the receptacle -- no additional inspection action is needed' conveys a non-obvious fact in one line, and the Error Recovery section is terse. It falls at anchor 4 rather than 5 because the observation patterns in 'Parse contents' ("On the {receptacle}, you see nothing." / "you see a {item1}, and a {item2}.") are repeated nearly verbatim in the two Example scenarios, a minor duplication that could be trimmed.

Actionability

Fully executable for the target environment: exact commands (`go to {target_receptacle}`, `take {item} from {receptacle}`), exact observation strings to match against, and two complete Action/Observation/Decision walkthroughs covering the empty and populated cases. This matches the anchor-5 'copy-paste ready, examples cover the common cases' standard; it is not anchor 4 because no key execution detail is missing.

Workflow Clarity

A clearly sequenced 4-step workflow (Navigate → Read observation → Parse contents → Decide next action) with explicit decision branches for each outcome (empty / item found / wrong items) and an Error Recovery feedback loop ('Nothing happened': the `go to` target name is invalid -- verify the receptacle name from your environment scan). This is a simple single-purpose skill, so the simple-skill exception applies and the explicit error-recovery loop satisfies the anchor-5 pattern; it is not anchor 4 because checkpoints for both success and failure outcomes are present.

Progressive Disclosure

The body is under 50 lines with clean sections (Workflow, Error Recovery, Example) that would merit a 5 under the simple-skill exception. However, the bundle contains `references/alfworld_actions_ref.md` which is never referenced or linked from SKILL.md, and it largely duplicates body content (observation patterns, `go to` description) and even ends mid-sentence in 'Skill Integration in Task Flow'. Scoring against the actual bundle structure, this unsignaled, partially truncated reference file is a minor organization gap, placing it at anchor 4 rather than 5.

Specificity

Lists multiple concrete actions — 'Inspects a receptacle's contents by navigating to it and reading the observation', 'Executes `go to {receptacle}`', 'parses the observation', 'decides whether to take an item, search elsewhere, or proceed' — which is near the comprehensive anchor 5. However, the trigger clause 'Use when you need to check...' uses second person, which the judging guidelines penalize by reducing specificity by 1; it fits anchor 4 (several specific actions, minor gaps) after the penalty rather than 5.

Completeness

Explicitly answers both questions: 'what' ('Inspects a receptacle's contents by navigating to it and reading the observation... Executes `go to {receptacle}`, parses the observation') and 'when' with concrete trigger phrases ('Use when you need to check what is on or inside a receptacle (e.g., "what's on the shelf"...)'). This mirrors the anchor-5 good example structure; it is not anchor 4 because the 'when' clause is fully explicit with example queries rather than merely stated.

Trigger Term Quality

Provides comprehensive natural trigger phrasing users would actually say: "what's on the shelf", "is the holder empty", "check the table for items", plus the synonym pair 'on or inside a receptacle'. This matches the anchor-5 pattern of covering natural terms and synonyms (file extensions are not applicable in this domain); it is clearly above anchor 4 since no obvious common variations are missing.

Distinctiveness Conflict Risk

The receptacle-inspection niche is well scoped ('check what is on or inside a receptacle') with distinct observation-parsing triggers, but 'check the table for items' and generic `go to` navigation could overlap with a sibling AlfWorld search/navigation skill — minor overlap with closely related skills, matching anchor 4. It is not anchor 5 because the phrasing does not fully disambiguate from a general 'find object' or 'navigate' skill, and not anchor 3 because the core trigger is receptacle-content checking, not broadly generic.