Conciseness

The body is lean and code-forward with no explanations of concepts Claude already knows, but 'Based on the Anthropic Cookbook customer support pattern' duplicates the frontmatter source field and the Quick Reference table restates tool descriptions already in the code — efficient with minor instances that could be trimmed, matching anchor 4 rather than anchor 5's every-token-earns-its-place.

Actionability

The agent loop is essentially copy-paste ready (full tool schemas, concrete model id, working control flow), but execute_tool delegates to undefined stubs (search_docs, create_zendesk_ticket, lookup_order, hand_off_to_agent). The flexibility is explicitly flagged ('implement with your docs', 'or your ticketing system'), which the rubric permits, so this is mostly executable with minor gaps — anchor 4, not the fully-executable anchor 5.

Workflow Clarity

The control flow is clearly sequenced (send, return on end_turn, execute tools and append results on tool_use, loop) and the system prompt embeds a checkpoint ('Always confirm before taking actions that affect the customer's account'), but there is no max-iteration or error-handling guard for the unbounded while True loop and no guidance on tool failures — clear sequence with minor validation gaps, anchor 4 rather than anchor 3 (checkpoints are present, not missing).

Progressive Disclosure

No bundle files exist and the single-file content is appropriately inline for one code pattern, organized into clear sections (Overview, Agent Architecture, Tool Implementation Stubs, Quick Reference). The redundant Quick Reference table adds little navigational value, so this fits anchor 4's good structure with minor organization gaps rather than anchor 5's well-signaled, cleanly split layout.

Specificity

Names the domain ('customer support agent') and three concrete capabilities ('knowledge base lookup, ticket creation, and human escalation logic'), but omits order-status lookup that the body implements — several specific actions with a minor coverage gap, matching the anchor-4 example rather than the comprehensive anchor 5.

Completeness

Both what ('knowledge base lookup, ticket creation, and human escalation logic') and when ('Use this skill when building a customer support agent') are explicitly present, but the when-clause largely restates the what and lacks distinct concrete trigger phrases, matching anchor 4 rather than the anchor-5 pattern of separate, specific triggers.

Trigger Term Quality

'customer support agent', 'ticket creation', 'escalation', and 'knowledge base' are natural phrases users would say, but common synonyms like 'customer service', 'helpdesk', or 'support chatbot' are missing — good coverage with a few natural terms absent, so anchor 4 rather than anchor 3 (which requires sparser keywords) or 5.

Distinctiveness Conflict Risk

A clear niche (support agent with KB lookup, ticketing, and escalation) with mostly distinct triggers; only minor overlap risk with generic agent-building skills, fitting anchor 4 rather than anchor 5's fully minimal conflict risk.