Server has 6 tools with complete input schemas and descriptions in Japanese. However, critical gaps limit production readiness: (1) Output schemas are completely undocumented, no tool declares what fields it returns, forcing LLMs to guess downstream field names and breaking tool chaining; (2) Descriptions lack actionable context, they state WHAT but not WHEN to use or prerequisites (e.g., search_papers doesn't explain it requires ELSEVIER_API_KEY setup); (3) No error handling guidance, tools fail silently on API errors with no recovery hints; (4) Parameter descriptions are minimal (avg ~40 chars vs baseline 72 chars) and lack format/constraint details; (5) No tool annotations (readOnlyHint, destructiveHint, idempotentHint) despite all being read-only operations. Naming is solid (verb_noun pattern, clear intent). Schemas are present but incomplete, missing required field validation and output structure documentation.

• Document output schema for each tool. Example for search_papers: 'Returns {results: [{title: string, authors: string, eid: string, doi: string, year: integer, citedby_count: integer}], total_count: integer}'. Include all fields needed for downstream tool calls (eid for get_paper_abstract, author names for get_author_info).
• Expand parameter descriptions with format and constraint details. For 'year': 'Publication year in YYYY format (1900 - 2099). If omitted, searches all years.' For 'field': 'Research domain keyword (e.g., artificial intelligence, quantum computing, climate change). Free-form text; Scopus will match partial keywords.'
• Add error recovery guidance to tool descriptions. Example: 'If ELSEVIER_API_KEY is not set, this tool will fail with RuntimeError. Set the environment variable before calling. If API returns 429 (rate limit), wait 60 seconds and retry.'
• Add readOnlyHint annotation to all 6 tools in the tool definition. This signals to agents that these calls are safe to retry and cache without side effects.
• Distinguish search_papers from search_open_access_papers in descriptions. Clarify: search_papers queries all Scopus content (requires subscription); search_open_access_papers filters to freely available papers only. When should an agent choose each?