HANA MCP Server has basic tool definitions with consistent naming (verb_noun pattern: hana_list_*, hana_describe_*, hana_execute_*) and present schemas. However, critical gaps undermine quality: (1) Most parameter descriptions are minimal or missing context about when/why to use optional parameters. (2) No output schemas documented, LLMs cannot predict response structure for chaining. (3) No error handling guidance, tools return raw errors without recovery hints. (4) hana_execute_query accepts arbitrary SQL with no injection guards or validation messaging. (5) Tool descriptions average ~60 chars, below the 194-char baseline for A+ tools. Schemas are present but lack depth (no examples, constraints, or field documentation). This is typical community-grade work: functional but not production-ready.

• Document output schemas for all tools. For hana_list_tables, specify: returns array of {table_name: string, schema_name: string, row_count?: number}. For hana_execute_query, specify: returns {rows: array, columns: array, affected_rows?: number}. Include pagination fields (total_count, next_cursor) if applicable.
• Add SQL injection guards and validation to hana_execute_query. Validate query length (max 10000 chars), reject DDL/DCL (CREATE, DROP, GRANT), enforce prepared statements for user input. Return clear error: 'DDL not allowed. Use hana_describe_table to inspect schema.' Mention timeout (30s) and result limit (1000 rows).
• Expand parameter descriptions to include fallback behavior. E.g., schema_name: 'Name of the schema (optional; defaults to HANA_SCHEMA environment variable if set, otherwise uses current user schema)'. Repeat this in each tool that accepts schema_name.
• Add error recovery guidance to tool descriptions. E.g., hana_test_connection: 'Returns success or failure. If failed, check HANA_HOST, HANA_PORT, HANA_USER, HANA_PASSWORD environment variables. Call hana_show_config to debug.' hana_execute_query: 'If query times out (>30s), simplify or add LIMIT clause. If syntax error, check HANA SQL dialect.'
• Expand tool descriptions to 100-200 chars with context on when to use each. E.g., hana_describe_table: 'Retrieve column names, types, and constraints for a table. Call this before hana_execute_query to understand schema. Returns column metadata including nullable, default, and key flags.' This helps LLMs choose the right tool.