This server has critical definition quality gaps. All three tools lack proper parameter descriptions (get_rate and get_news have empty input schemas with no documentation; get_weather has minimal schema). Descriptions are in Russian and extremely brief (10-20 chars), below the 34-char p10 baseline. No output schemas are documented. Tools are not registered via MCP protocol, they are Flask HTTP endpoints, not MCP tool definitions. The codebase shows no evidence of MCP server implementation; it's a plain Flask app.

• Implement this as a proper MCP server using the official Python SDK (mcp package). Register tools via server.add_tool() with full MCP tool definitions, not Flask routes.
• Rewrite all descriptions in English, 50-200 characters, following the pattern: 'What does it do? When to use it? What does it return?' Example: 'get_rate: Fetch the current USD to RUB exchange rate. Returns a string with the rate value. Use when the user asks about currency conversion.'
• Add output schemas for all tools. Document what fields are returned and their types. Example for get_rate: {"type": "object", "properties": {"rate": {"type": "number", "description": "USD to RUB exchange rate"}, "timestamp": {"type": "string", "format": "date-time"}}}
• Add parameter constraints to get_weather. Specify city format (e.g., 'City name (2-50 alphanumeric chars, e.g., Moscow, New York). Required.') and document what happens if the city is not found.
• Add error handling: wrap external API calls in try-except, return structured errors with recovery hints (e.g., 'Weather service unavailable. Try again in 30 seconds.' or 'City not found. Check spelling and try again.'). Set 10-second timeouts on all HTTP requests.