40 tools with consistent naming (verb_noun pattern: quote.*, kline.*, search.*, etc.) but critical gaps in descriptions and schemas. All tools have descriptions, but most are 10-30 chars (well below 50-200 char LLM-optimized baseline). Input schemas present but minimal: most parameters lack type definitions beyond 'array'/'string'/'integer'. No output schemas documented. No error handling guidance. No parameter enums despite many accepting constrained values (e.g., period: '1m'/'5m'/'1d', market: 'SH'/'SZ'). Tool composition is sound (each does one thing), but descriptions don't explain WHEN to use each variant (quote.full vs quote.simple, kline.history vs kline.minute) or what fields are returned.

• Expand all tool descriptions to 50-200 chars. Example: 'quote.full' → 'Fetch complete stock quote including price, volume, fund flow direction, and daily limit status. Use this for detailed analysis; use quote.simple for basic price only.' This disambiguates from quote.simple and explains when to call each.
• Document output schemas for all tools. Specify returned fields, types, and units. E.g., quote.full returns {code, name, price (number), volume (integer), fundFlow (object with inflow/outflow), limitStatus (enum: up/down/none)}. This enables LLMs to chain tools and extract data correctly.
• Add enums to all constrained parameters. E.g., period: enum ['1m', '5m', '15m', '1h', '1d', '1w', '1M']; market: enum ['SH', 'SZ', 'HK', 'US']; adjustType: enum ['none', 'forward', 'backward']. Prevents hallucinated invalid values.
• Add parameter format hints and ranges. E.g., 'code (string, 2-6 uppercase alphanumeric, e.g., 000001 for Ping An Bank)'; 'limit (integer, 1-500, default 20)'; 'startDate (ISO 8601 string, e.g., 2024-01-15)'. Guides LLM input generation.
• Implement error recovery guidance. When a tool fails, return actionable next steps. E.g., 'Stock code "INVALID" not found. Try search.symbol(keyword="invalid") to find matching codes.' This prevents dead-end failures and guides agent retry logic.

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

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