Update mcp.json

mcp.json

@@ -1,11 +1,11 @@
 {
   "mcpServers": {
     "calculator": {
-      "command": "python",
+      "command": "/app/.venv/bin/python",
       "args": ["./tools/calculator.py"]
     },
     "weather": {
-      "command": "python",
+      "command": "/app/.venv/bin/python",
       "args": ["./tools/weather.py"]
     }
   }