Server has 6 well-named tools with clear verb-noun patterns (get_*). All tools have descriptions (194 - 250 chars, within baseline 34 - 392 range) and documented input schemas with types. However, output schemas are inferred from type hints rather than explicitly documented in descriptions. Parameter descriptions are present but minimal (10 - 30 chars vs baseline 72 chars). No enum constraints on optional parameters. Error handling logs exceptions but does not guide LLM recovery. Missing tool annotations (readOnlyHint, idempotentHint). All tools are READ_ONLY financial data fetches, so composition and idempotency are not concerns, but descriptions could better explain WHEN to use each tool vs alternatives.

• Add explicit output schema documentation to each tool description. Example: 'Returns: List[EarningsReport] with fields: symbol (str), date (str, ISO 8601), eps (float), eps_estimated (float), surprise_percentage (float).'
• Expand parameter descriptions to 50 - 100 chars. Include format, constraints, and context. Example: 'symbol: Stock ticker symbol (1 - 5 uppercase letters, e.g., AAPL, MSFT). Use search_symbols() if unsure.'
• Add readOnlyHint=true to all tool definitions via fastmcp annotations to signal to agents these are safe, idempotent reads.
• Implement structured error responses with error codes and recovery hints. Example: {'error': 'INVALID_SYMBOL', 'message': 'Symbol INVALID not found.', 'suggestion': 'Try search_symbols(query="invalid") to find similar tickers.'}
• Add enum constraints or regex patterns for date parameters. Example: from_date with pattern '^\d{4}-\d{2}-\d{2}$' and description 'Start date in YYYY-MM-DD format (past 10 years only).'

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

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