Conciseness

Largely efficient and assumes Claude's competence (no explaining what spreadsheets are), but the missing-input policy is stated twice — once as its own section and again inside the system-prompt template — which is mild redundancy a 5-anchor body would not have.

Actionability

Provides fully executable guidance: concrete name/description patterns, a complete system-prompt template with exact refusal wording, a numbered worked example with precise reply text, and explicit capability-attachment ordering. Copy-paste ready for an instruction-only skill.

Workflow Clarity

Multi-step worked example is clearly sequenced with explicit completion criteria and a verification checkpoint ('verified by reading back'), plus a dry-run -> confirm feedback loop for destructive operations — matching the 5-anchor with explicit validation steps.

Progressive Disclosure

Well-organized with clear section headers and no bundle files to misroute, but ~120 lines of inlined templates/examples with the duplicated missing-input policy shows minor organization gaps rather than the tight one-level split of a 5-anchor.

Specificity

Lists multiple concrete actions ('updates rows, reads cells, computes totals, generates reports from sheets, syncs data between spreadsheets') across named platforms — comprehensive coverage matching the 5-anchor.

Completeness

Explicitly answers both what ('Authoring playbook for building agents that read or write tabular data') and when ('Use this when the user wants an agent that updates rows...') with concrete trigger phrases.

Trigger Term Quality

Comprehensive natural-term coverage including synonyms and formats ('Google Sheets, Microsoft Excel, CSV, Airtable, Notion databases') plus 'rows, columns, ranges, or worksheets' that users would naturally say.

Distinctiveness Conflict Risk

Clear niche (agent authoring for spreadsheets) with distinct triggers and minimal overlap risk with unrelated skills.