15 tools with READ_ONLY operations, but critical gaps in schema visibility and parameter documentation. Tool names follow verb_noun pattern (get_*, housing_*) which is good. However, source code provided does not show explicit tool registration with JSON Schema input definitions, only tool names and descriptions are visible. Parameter schemas for tools 7-10, 11-14 are inferred from brief descriptions but not shown in actual code. No output schemas documented. Descriptions are present (avg ~100 chars) but lack actionable detail on when to use each tool vs. alternatives. No error handling guidance visible. This is a typical C-grade community server with incomplete schema visibility.

• Add explicit JSON Schema definitions for all tool inputs. For tools 7-10, convert 'e.g. WTI, BRENT' to enum: ['WTI', 'BRENT', 'NATURAL_GAS', ...]. For tools 11-14, define symbol as string with pattern or enum.
• Document output schemas for all tools. Example: 'Returns {date: string (YYYY-MM-DD), price: number, change_percent: number}'. This enables LLMs to extract and chain results.
• Add error handling guidance to each tool description. Example: 'If symbol not found, returns error 404 with message "Symbol INVALID not found. Try search_symbols() first."'
• Expand descriptions to 100-200 chars with WHEN-to-use context. Example: 'Get 30-year mortgage rate (weekly). Use this BEFORE housing_prices to understand affordability trends. Returns current rate and 52-week high/low.'
• Add tool-chaining hints. Example in company_overview: 'After calling this, use earnings to see historical performance, or news_sentiment to gauge market sentiment.'

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

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