The server defines 6 tools with complete input schemas and descriptions. All tools follow verb_noun naming conventions (get_*, compare_*). Descriptions are present and contextual. However, several critical issues reduce quality: (1) Output schemas are declared via TypedDict but not documented in tool descriptions, forcing LLMs to infer return structure. (2) Error handling is absent, no guidance on what to do if a symbol doesn't exist, timestamps are invalid, or the database is unreachable. (3) Parameter descriptions lack format constraints (e.g., timestamp format is stated as 'YYYY-MM-DD HH:MM:SS' but no validation examples or error cases are mentioned). (4) No pagination metadata in responses, tools return lists with count but no next_cursor or offset for large datasets. (5) The limit parameter (1-1000) is described but not validated in visible code. (6) Tool composition is reasonable but utility helpers (get_current_date, compare_dates) feel tangential to the core trading data retrieval mission.

• Add explicit output schema documentation to each tool description. Example: 'Returns a CandleResponse with fields: candles (array of {data_id, symbol, time_frame, open, high, low, close, volume, timestamp}), start_timestamp (string), end_timestamp (string), count (integer).'
• Document error cases and recovery paths. Example: 'If symbol is not found in the database, the response will include error: {code: "SYMBOL_NOT_FOUND", message: "Symbol 'XYZ' not found. Available symbols: AAPL, MSFT, ..." }. Call a discovery tool or check the symbol spelling.'
• Add input validation constraints to parameter descriptions. For time_frame, state: 'Valid values: 1, 5, 15, 30 (normalized to 30m), 60, 1D, 1W, 1M. Invalid values will return a validation error.'
• Extend all four candle/footprint/cvd/ema tools to return pagination metadata: has_more (boolean), next_offset (integer), total_available (integer). This enables safe iteration through large result sets.
• Consider removing or deprecating get_current_date and compare_dates. Modern agents can get today's date from system context and perform date math in-context. If retained, move to a separate 'utility' namespace and clearly document when an LLM should call them vs. reason locally.
• Add idempotency hints to tool descriptions. All four data-fetch tools are read-only and idempotent, but this is not explicit. Add 'This tool is idempotent and read-only, safe to call multiple times with the same parameters.'
• Document the exchange parameter more clearly across all four tools. State: 'If the same symbol trades on multiple exchanges (e.g., AAPL on NASDAQ and other venues), specify exchange to disambiguate. If omitted, returns data from the first match.'