Server has 5 tools with basic schemas and descriptions, but significant quality gaps. Tool names lack clear action verbs (Serper_web_search, DDGS_web_search are inconsistent; arxiv_search lacks verb). Descriptions are present but often generic or in Chinese without English translation for non-Chinese users. Parameter descriptions exist but lack detail on constraints, formats, and valid ranges. No documented output schemas. Error handling and recovery guidance absent. No tool annotations (readOnlyHint, etc.). Composition is reasonable (5 distinct search/fetch tools), but naming inconsistency and missing schema documentation are critical gaps.

• Rename tools to follow verb_noun pattern: 'search_serper', 'search_arxiv', 'search_ddgs', 'fetch_pdf', 'fetch_webpage'. Use consistent casing (snake_case).
• Add English descriptions for all tools. Current Chinese descriptions are inaccessible to non-Chinese LLMs. Provide 50-200 character descriptions explaining WHAT, WHEN, and WHAT IT RETURNS.
• Document output schemas for each tool. Specify returned fields (e.g., 'results: [{title, url, snippet, source}]'), types, and whether results are paginated. Include example output structure.
• Add parameter constraints: max_results (1-50), timeout (5-120 seconds), pdf_url (must be valid HTTP/HTTPS URL). Include these in parameter descriptions, not just JSON Schema.
• Add error handling guidance: 'If no results found, try broader keywords or different search engine. If PDF download fails, verify URL is publicly accessible and not behind authentication.'