The server provides 9 well-structured tools with consistent naming conventions (all start with verb: get_, search_, compare_). Tool descriptions are present and reasonably detailed (averaging ~120 chars), explaining what each tool does and when to use it. However, several critical gaps limit production readiness: (1) No documented output schemas for any tool, LLMs cannot plan downstream composition without knowing what fields are returned; (2) Parameter descriptions are minimal or absent in several tools (e.g., get_market_overview and get_sector_performance have no parameters but no documentation of their return structure); (3) Missing error handling guidance, no indication of what errors can occur, when to retry, or how to recover; (4) No tool annotations (readOnlyHint, idempotentHint) despite all tools being read-only operations. Tool definitions are clearly visible in src/server/index.ts, so inference penalty does not apply. The core toolkit is logically organized and domain-coherent (Indonesian stock market analysis), but lacks the depth needed for confident agent integration.

• Document output schemas for all tools. For each tool, define: (1) successful response structure with field names, types, and examples; (2) whether results are paginated and how; (3) which fields uniquely identify results (e.g., 'ticker' in search results) so downstream tools can compose. Example for search_stocks: { "results": [ { "ticker": "string", "company_name": "string", "sector": "string" } ], "total_count": "number", "next_cursor": "string|null" }
• Add explicit error handling guidance to each tool description. State: (a) What errors can occur (invalid ticker format, API rate limit, network timeout); (b) Which are retryable (rate limit, timeout) vs. fatal (invalid ticker, not found); (c) Recovery action (e.g., 'If ticker is invalid, call search_stocks() to find the correct symbol'). Example: 'Returns 404 if ticker does not exist, use search_stocks() to discover valid tickers first.'
• Add readOnlyHint=true and idempotentHint=true to all 9 tool definitions in the MCP server initialization. This is a critical signal for agent safety reasoning and enables confident retry strategies.
• Clarify pagination and result limits in descriptions. Add: '(a) This tool returns up to [X] results. (b) To retrieve more, use pagination with cursor [Y]. (c) Call get_available_stocks() first to filter by available tickers and reduce result size.' Example for search_stocks: 'Returns up to 50 results. Use cursor-based pagination if more exist. Returns ticker field for use with get_stock_info.'
• Enhance parameter descriptions with explicit constraints and examples. For compare_stocks, change description to: 'Array of 2 - 5 stock ticker symbols to compare (e.g., ["BBCA", "TLKM", "ASII"]). If more than 5 tickers provided, only the first 5 are compared. Use search_stocks() to find valid tickers.' This prevents LLM confusion about the 5-ticker limit.

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

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