This server has severe definition quality issues. Tool naming is inconsistent and ambiguous (two tools named 'send_email_to_user' with different signatures). Descriptions are vague and lack actionable context. Parameter schemas are present but descriptions are minimal. No output schemas documented. Error handling is absent, tools return bare strings or objects without guidance. The execute_sql tool is particularly dangerous with no input validation. Overall, this reads like a prototype, not production-ready code.

• Rename the two 'send_email_to_user' tools to 'send_weather_email' and 'send_refund_confirmation_email' to avoid collision and clarify intent.
• Add input validation and parameterized queries to execute_sql. Never accept raw SQL. Return structured error responses: {success: false, error: 'SQL injection detected', suggestion: 'Use parameterized queries'}.
• Document output schemas for all tools. E.g., get_weather_details returns {city: string, condition: string, temperature_c: number}. fetch_plan_details returns {plans: [{plan_id, price_inr, speed}], total_count: number}.
• Expand descriptions to 50-150 characters with WHEN/WHY context. E.g., 'Fetch current weather for a city. Use this when users ask about temperature, conditions, or forecasts. Returns temperature in Celsius and weather condition.'
• Add pagination to fetch_plan_details_tool: accept limit (1-100, default 20) and offset parameters. Return {plans: [...], total_count: 3, has_more: false}.