Server has 6 well-named, read-only tools with clear descriptions and documented input schemas. All tools follow verb_noun naming (check_, get_, execute_, list_, describe_). Descriptions are adequate (50-150 chars) and explain purpose. Input schemas are present with type declarations and parameter descriptions. However, output schemas are not documented, LLMs cannot predict response structure for downstream chaining. Error handling is minimal (no recovery guidance, no categorization). No tool annotations (readOnlyHint, idempotentHint). Parameter descriptions lack format constraints and validation rules. Missing pagination support for list_tables and list_databases despite potentially large result sets.

• Document output schemas for all tools. E.g., execute_query returns {data: [{col1: value, ...}], rows: number, statistics: {...}}. Include field types and nesting structure so LLMs can plan downstream calls.
• Add readOnlyHint: true to all tool definitions in FastMCP decorator. This signals to clients that these tools are safe to call without user confirmation.
• Add format constraints to parameter descriptions. E.g., 'table: Table name in format "db.table" or "table" (uses default database if omitted).' Formalize the auto-detection logic for timestamp_col.
• Implement pagination for list_databases and list_tables. Add optional limit (default 50, max 1000) and offset parameters. Return total_count so LLMs know if more results exist.
• Enhance error handling in client.query() to categorize errors: return {error: string, category: 'not_found'|'invalid_query'|'permission_denied'|'timeout', suggestion: string}. E.g., 'Table not found. Available tables: [...]'.