Conciseness

The body is lean and assumes competence (no explaining of ALFWorld basics), but step 3's bullet 'opening it is a critical verification step' duplicates step 2's closed-receptacle handling, and the 'Thought Process Template' section ends mid-sentence with no template, wasting tokens. It is efficient with minor trims possible, matching the level-4 anchor rather than the fully lean level-5 anchor.

Actionability

Concrete command templates ('go to {recep}', 'open {recep}', 'take {obj} from {recep}') plus a complete worked Thought/Action/Observation example make the guidance mostly executable. The missing pieces — the promised but empty 'Thought Process Template' and the unlinked action reference — keep it below fully copy-paste-ready coverage.

Workflow Clarity

A clear four-step sequence with per-location verification logic ('If the target object is now present, retrieve it... note it as thoroughly checked and move to the next location') and an explicit both-branch conclusion. The empty template section and absence of any recovery guidance for unexpected observations are minor gaps, matching level 4 rather than the fully validated level-5 anchor.

Progressive Disclosure

The body is short and well-sectioned, but the bundle provides references/alfworld_actions_ref.md — which even contains a 'Key Notes for Search Verifier Skill' section — and the body never signals or links it. Per the rubric's bundle-structure guideline this is 'references present but not clearly signaled', fitting the level-3 anchor.

Specificity

The description lists multiple concrete actions — 'Systematically revisits receptacles, re-opens closed containers, and re-inspects contents' — giving comprehensive coverage of the skill's behavior. There are no meaningful coverage gaps, so it exceeds the 'several specific actions' level-4 anchor.

Completeness

It explicitly answers both questions: the 'what' ('Re-examines previously visited locations... revisits receptacles, re-opens closed containers, re-inspects contents') and an explicit 'Use when...' clause with concrete trigger conditions. This matches the level-5 anchor exactly; the 'when' is explicit, not merely present.

Trigger Term Quality

Natural trigger phrases like 'initial search fails to find enough objects', 'double-checking', and 'before concluding task failure' map well to what a user or agent would say. Common synonyms such as 'recheck', 'verify', or 'missed object' are absent, keeping it just below the comprehensive level-5 anchor.

Distinctiveness Conflict Risk

The niche — re-verifying already-searched locations before declaring task failure — is clearly distinct from initial-search or general-exploration skills, and the 'when an initial search fails' framing minimizes wrong-skill triggering.