Conciseness

The bulk of the Membrane CLI instructions is efficient and code-driven, but the opening paragraph explains what the Polymer JS library is ('a Javascript library for creating custom HTML elements...') — a concept Claude already knows and, notably, the wrong product — plus a vague 'Polymer Overview' tree. It is not a 4 because these padded/explanatory sections are noticeable, and not a 2 because most of the body is tight and command-oriented.

Actionability

It provides concrete, executable commands throughout (install, login, connection ensure, action list/run, request) plus a flags table. It is not a 5 because commands rely on unsubstituted placeholders (CONNECTION_ID, QUERY, <actionId>) and the 'Polymer Overview' gives only the vague directive 'Use action names and parameters as needed', and not a 3 because the guidance is genuinely executable rather than pseudocode.

Workflow Clarity

The connection flow is clearly sequenced with state-based validation checkpoints and feedback loops (poll until READY, handle CLIENT_ACTION_REQUIRED, check error fields). It is not a 5 because the body references 'Step 2' which is never labeled, and the JS-library intro is incoherent with the actual data-product workflow; not a 3 because explicit validation and retry loops are present.

Progressive Disclosure

With no bundle files present, the single SKILL.md is organized into clear headed sections (Install, Authentication, Connecting, Searching, Running, Proxy, Best practices). It is not a 5 because it exceeds the simple-skill line and contains organizational noise (the wrong-product docs link and the unexplained Document/Page/Element/Style/Theme tree), and not a 3 because structure is genuinely good.

Specificity

The description names the domain ('Polymer integration') but the listed actions ('Manage data, records, and automate workflows') are generic and abstract rather than concrete, matching the anchor 'Names the domain but actions are minimal or generic'. It is not a 3 because no concrete, specific action (akin to 'extracts content') is stated.

Completeness

It explicitly answers both 'what' ('Manage data, records, and automate workflows') and 'when' ('Use when the user wants to interact with Polymer data'). It is not a 5 because the 'what' is vague rather than concrete, and not a 3 because the 'when' is explicit rather than missing or weakly implied (so the missing-trigger cap does not apply).

Trigger Term Quality

It includes relevant keywords ('data', 'records', 'workflows', 'Polymer data') and an explicit trigger ('Use when the user wants to interact with Polymer data'), but coverage relies on the product name and misses common variations or synonyms. It is not a 4 because natural phrasing variety is thin, and not a 2 because several relevant terms are present.

Distinctiveness Conflict Risk

Tying triggers to a named product ('Polymer data') gives it a mostly distinct niche with minor overlap risk. It is not a 5 because 'Polymer' is also a well-known web-components library, creating some ambiguity, and not a 3 because the data-oriented triggers keep it reasonably distinguishable.