Conciseness

The body is mostly efficient — no filler explaining concepts Claude already knows, and the type-mapping table and Mermaid example are dense — but the MySQL-vs-PostgreSQL routing rule is repeated four times ("Then also read", Overview bullet, the entire "Quick routing" section, and Best practices #5), which is more than the 'minor instances' of anchor 4. Matches anchor 3 ("Mostly efficient but includes some unnecessary explanation or could be tightened").

Actionability

Concrete, executable guidance dominates: exact tool invocations with parameters (`manageDataModel(action="list"|"get"|"docs")`, `modifyDataModel` with `action="create"` and a `mermaidDiagram`), a complete copy-paste-ready Mermaid example with required()/unique()/display_field(), and an exact type-mapping table. Not anchor 5 because a full modifyDataModel call example (complete payload) is absent and enum handling is vague ("Keep enum values human-readable when needed" gives no syntax).

Workflow Clarity

The "How to use this skill" section gives a clear 4-step sequence (clarify entities → model and validate → use the right tools → publish carefully) with explicit validation checkpoints ("Validate names, field types, and relationships before calling modeling tools"; "Publish only after checking field names, required constraints, and relationship directions"), matching anchor 4. Not anchor 5 because there is no error-recovery feedback loop (no 'if the generated model shows problems, revise the diagram and re-run') around the publish step, though the destructive-operation cap does not apply since validation steps are present.

Progressive Disclosure

The single-file skill (~175 lines) is well organized with clear sections, and all external references are one-level-deep, clearly signaled sibling skill paths with stated purposes (e.g., "Direct MySQL SQL creation -> ../relational-database-mcp-cloudbase/SKILL.md"); no bundle files exist to verify. Not anchor 5 because there is no file split at all (the Mermaid generation rules / type table are reference-style material that could live in a reference file) and the duplicated routing blocks dilute the overview's navigational clarity.

Specificity

The skill's own capability is stated only as "Optional advanced tool for complex data modeling" — a domain name with a generic action, matching anchor 2 ("Names the domain but actions are minimal or generic", cf. "Processes PDF files"). The concrete tool names present (relational-database-tool, queryPgDatabase, managePgDatabase) describe the *replacement* skills, not what this skill does (e.g., no mention of Mermaid classDiagram generation, model listing, or publishing).

Completeness

There is a moderate 'what' ("advanced tool for complex data modeling") and no explicit 'Use when...' clause for this skill; the 'when' is only weakly implied by negation ("For simple MySQL table creation, use relational-database-tool directly"), which caps completeness at 3 per the judging guidelines. Not anchor 2 because the 'what' is stated rather than vague, and the deprecation routing does weakly imply when the skill still applies (complex, non-simple modeling).

Trigger Term Quality

Relevant keywords exist ("data modeling", "MySQL table creation", "PostgreSQL", "CloudBase PG schema", "DDL"), but the natural phrases users would say when they need this skill — "ER diagram", "Mermaid", "classDiagram", "data model", "schema design" — are all absent, matching anchor 3 ("Some relevant keywords but missing common variations or synonyms"). Not anchor 4, since the core trigger vocabulary for the skill itself is missing rather than just a few terms.

Distinctiveness Conflict Risk

The description explicitly steers the adjacent cases away ("use relational-database-tool directly", "use postgresql-development"), giving clear boundary-setting with minor overlap risk, matching anchor 4. Not anchor 5 because the skill's own trigger ("complex data modeling") is not distinctive and lacks the Mermaid/ER-diagram terms that would give it a clear niche with distinct triggers.