Conciseness

The body is ~30 lean lines: a compact action table, a four-step workflow, and one worked example, with no explanations of concepts Claude already knows ("All containers are pre-opened. Do not use `open` or `close` actions" is environment-specific and earns its place). Matches anchor 5's 'every token earns its place'.

Actionability

Fully executable environment commands are given (`move <SUBSTANCE> to <DESTINATION>`, `look around`, `look at OBJ`) plus a worked example with expected confirmation output ("a metal pot (containing a substance called lead)"). Copy-paste ready and covers the common case, matching anchor 5.

Workflow Clarity

The Core Workflow is a clear four-step sequence (Assess → Locate → Execute → Verify) with an explicit verification step ("`look at <DESTINATION>` to confirm the substance is now inside") and an error-recovery loop ("If the transfer fails… verify object names with `look around`"). Matches anchor 5's explicit validation with feedback loops.

Progressive Disclosure

The body is well-organized for a simple skill, but the bundle's `references/container_properties.md` — directly relevant to the note "Choose the destination container based on properties needed for the next step" — is never linked or mentioned in the body. This is 'references present but not clearly signaled' (anchor 3), not 4, because the reference is entirely absent from the body's navigation rather than merely unclear.

Specificity

"Moves a substance or object from one container to another (e.g., moving lead to a metal pot)" plus concrete variants like "transferring a substance into a heat-resistant container before heating" name several specific actions. Not a 3 because the actions go beyond 1-2 generic verbs with a concrete example; not a 5 because all variants revolve around a single move operation rather than a comprehensive multi-action list.

Completeness

Explicitly answers both: what ("Moves a substance or object from one container to another") and when ("Use this skill when you need to prepare materials for processing, such as…") with concrete trigger situations. Clearly matches the anchor 5 example structure rather than the weaker 'when' of anchor 4.

Trigger Term Quality

Natural phrases users would say are present: "moving lead to a metal pot", "before heating", "reorganizing materials between vessels", "mixing or measurement". Not a 5 because common synonyms (pour, relocate, empty into) and alternate phrasings are missing.

Distinctiveness Conflict Risk

Container-to-container transfer is a clear niche with distinct triggers. Not a 5 because the trailing "mixing or measurement" use cases create minor overlap risk with dedicated mixing/measurement skills.