The server has 5 well-named tools covering online judge problem lookup and status queries. Tool names follow verb_noun convention (resolve_problem, get_problem, get_platform_status, get_daily_challenge, find_similar_problems). All tools have descriptions (50-150 chars) that explain what they do and when to use them. Input parameters are documented with type hints and descriptions. However, there are significant gaps: no output schemas are documented in the source code provided; error handling guidance is absent; parameter constraints (enums, ranges) are minimal; and descriptions lack dependency hints and usage guidance. The descriptions are well above the minimum threshold (>20 chars) and informative, placing them in the 'good' range for LLM consumption, but lack the production maturity of A-grade servers. The tool composition is clean (one responsibility per tool), but schema completeness is a major gap preventing a higher score.

• Document output schemas for all tools. Include field names, types, and what each field means. Example for resolve_problem: {title: string, difficulty: string, tags: [string], description: string, platform: string}. This is critical for LLM chaining.
• Add error handling guidance to each tool description. E.g. for resolve_problem: 'If the problem is not found, returns 404 with a list of similar problem URLs. If the platform API is temporarily unavailable, returns 503 and should be retried with exponential backoff.'
• Declare 'source' as an enum parameter (one of 'leetcode' | 'codeforces' | 'atcoder' | 'luogu') for get_problem and find_similar_problems. This prevents hallucinated platform names.
• Add min/max bounds to numeric parameters: limit (1 - 50, default 10), threshold (0.0 - 1.0, default 0.0) in find_similar_problems. Document query length constraints (3 - 2000 chars) as a validation rule, not an example.
• Expand find_similar_problems description to clarify mutual exclusivity: 'Either provide a text query (takes priority) OR source + id pair. Both may not be empty.' This prevents LLMs from passing both.
• Add recovery guidance to resolve_problem: 'If the URL/slug format is not recognized, returns 400 with a list of supported formats. Use get_problem for source + ID lookup if format is ambiguous.'
• Remove example timezone values from get_daily_challenge and replace with enum constraint on domain parameter.
• Document pagination for tools returning lists (find_similar_problems returns ranked results; clarify if there's a hard cap and if additional results are available).

Inferred effective spec: <=2025-11-25.

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