Both tools have critical definition gaps. Tool names (buy_a_stock, sell_a_stock) use underscores but lack clear verb-noun structure ('buy' and 'sell' are verbs, but 'a_stock' is awkward). More critically: zero tool descriptions exist, LLMs cannot determine when/why to select these tools. Parameters lack descriptions entirely (stock and qty have null descriptions in schema). No output schema is documented. No error handling guidance. This server fails on 4 of 6 core definition dimensions.

• Add tool descriptions (50 - 200 chars): 'Buy shares of a stock on NSE exchange using market order. Requires valid stock symbol and positive quantity.' Similar for sell_a_stock.
• Add parameter descriptions: stock → 'NSE stock symbol (e.g., GOLDBEES, INFY). Case-sensitive.'; qty → 'Number of shares to buy/sell. Must be positive integer.'
• Document output schema: return {order_id, status, quantity, symbol, transaction_type, timestamp} so LLMs know what to expect.
• Move API credentials to environment variables (KITE_API_KEY, KITE_ACCESS_TOKEN) and load via process.env. Never hardcode secrets.
• Wrap placeOrder in try-catch with structured error responses: {error: 'Insufficient funds', retryable: false} or {error: 'API timeout', retryable: true, suggestion: 'Retry in 30 seconds'}.