Single-tool server with well-structured schema, clear naming, and good parameter validation. Tool name 'search_words' follows verb_noun convention. Input schema properly defines a constrained array (min 1, max 10 items) and enum-constrained dict_type parameter. Description is present and action-focused. Output schema (SearchResponse) is documented via return type annotation. However, description lacks depth about when to use the tool, what prerequisites exist, and what the response structure contains, falls short of LLM-optimized guidance. No error handling documentation visible. Parameter descriptions are minimal (generic phrases like 'List of Korean words'). Schema is well-formed but sparse on narrative guidance.

• Expand tool description to 100 - 200 characters: 'Search 1 - 10 Korean words in Naver Dictionary. Returns translations, definitions, examples, and pronunciation. Use for understanding Korean vocabulary or translating words to Chinese or English. Queries up to 10 words in a single call for efficiency.'
• Add constraints to parameter descriptions: words → 'Array of Korean words (1 - 10 items; each 1 - 50 characters; may include Hangul or romanization; case-insensitive). Duplicates are removed.'; dict_type → 'Dictionary variant: ko-zh (Korean→Chinese, 4.5M entries) or ko-en (Korean→English, 2.1M entries). Defaults to ko-zh.'
• Document the SearchResponse structure explicitly, including all top-level and nested fields, their types, and what each represents. Example: 'Returns { summary: { succeeded: int, failed: int }, results: [{ word: string, definitions: [{ pos: string, meaning: string, examples: [string] }], pronunciation: string }] }'
• Add error handling documentation: 'Returns HTTP 400 if words array is empty or exceeds 10 items, or if dict_type is invalid. Returns HTTP 401 if Bearer token is missing/invalid. Returns HTTP 429 if rate-limited (max 100 queries/minute). Errors include actionable guidance: e.g., "Rate limited. Wait 30s before retrying."'
• Declare required permissions/scopes in tool metadata: e.g., 'Requires: read:naver-dictionary. No write side effects.'
• Enhance logging to include caller identity and full request context (not just success metrics). Log failed lookups and malformed inputs separately so issues are traceable.

Inferred effective spec: 2026-07-28+.

• Relies on Logging (deprecated) - log to stderr or use OpenTelemetry