Conciseness

The body is ~20 lean lines: a two-line 'When to Use', a three-step procedure with exact commands, a safety guard ("Do not `mix` unless the container holds the exact ingredients required by the recipe"), and one worked example. Nothing explains concepts Claude already knows and every section earns its place, matching the 'lean and efficient' anchor; it is not 4 because there is no over-explanation to trim.

Actionability

Commands are fully executable and templated (`examine <CONTAINER>`, `mix <CONTAINER>`, `focus on <NEW_SUBSTANCE>`), and the Example section walks a concrete end-to-end case with real inputs ('examine glass cup', 'mix glass cup') and the expected output ('salt water'). This matches 'fully executable; copy-paste ready... specific examples cover the common cases'; it is not 4 because there are no gaps in the guidance.

Workflow Clarity

The procedure is a clear, numbered sequence with a pre-check (examine to verify ingredients), a guard against wrong mixes, and a post-check (examine/focus to confirm the synthesis succeeded). It is not 5 because there is no error-recovery feedback loop — the body never says what to do if the mix fails or produces an unexpected substance; it is not 3 because validation checkpoints are explicitly present rather than missing.

Progressive Disclosure

The body is a concise overview with well-organized sections and a single clearly-signaled, one-level-deep pointer — "For common chemical recipes (e.g., salt water = sodium chloride + water), see `references/common_recipes.md`" — and that file exists in the bundle with content matching its purpose. This matches the 'clear overview with well-signaled one-level-deep references' anchor; it is not 4 because there are no organization gaps.

Specificity

The description names one concrete action — "chemically mixes the contents of a container using the 'mix' action" — but offers no further specific capabilities; the final sentence ("performs the mixing operation and outputs the resulting product") restates the same action rather than adding new ones. This matches the 'names domain and 1-2 concrete actions, but not comprehensive' anchor; it is not 4 because it does not list several specific actions, and not 2 because the action stated is concrete, not generic.

Completeness

Both what ("chemically mixes the contents of a container using the 'mix' action") and when ("Use when all required ingredients (e.g., sodium chloride and water) are present inside a container and the agent needs to combine them to produce a new substance") are explicitly and concretely stated. This matches the top anchor; it is not 4 because the 'when' clause is already explicit and specific rather than needing more detail.

Trigger Term Quality

Trigger phrases like "mix", "combine", "ingredients", "sodium chloride and water", and "produce a new substance" are relevant, but there are no synonyms or variations (e.g., "solution", "dissolve", "chemical reaction") beyond the single 'mix' framing. This fits 'some relevant keywords but missing common variations or synonyms'; it is not 4 because keyword coverage is thin rather than merely missing a few natural terms.

Distinctiveness Conflict Risk

The niche (mixing verified ingredients inside a container via the 'mix' action) is well-scoped and clearly distinguishable from unrelated skills. It is not 5 because generic trigger phrases like "combine them to produce a new substance" and "synthesis" could overlap with other chemistry/synthesis-oriented skills; it is clearly above 3, which implies meaningful overlap risk.