Update timezone description to emphasize explicit user confirmation of region

src/utils/_openai_client.py

@@ -41,7 +41,7 @@ _OPENAI_TOOLS = [
                 },
                 "timezone": {
                     "type": "string",
-                    "description": "The timezone for the available slots. It must be a tz identifier like America/New_York, Asia/Kolkata, Cuba, etc.Note: We have regional calenders for APAC, EMEA, and North America. Please use the timezone accordingly.",
+                    "description": "The timezone for the available slots. It must be a tz identifier like America/New_York, Asia/Kolkata, Cuba, etc.Note: We have regional calenders for APAC, EMEA, and North America. Please use the timezone accordingly. The region must be asked explicitly from the user and hence confirmed too.",
                 },
             },
             "required": ["salesperson_meeting_id", "timezone"],
@@ -75,7 +75,7 @@ _OPENAI_TOOLS = [
                 },
                 "timezone": {
                     "type": "string",
-                    "description": "The timezone for the available slots. It must be a tz identifier like America/New_York, Asia/Kolkata, Cuba, etc.Note: We have regional calenders for APAC, EMEA, and North America. Please use the timezone accordingly.",
+                    "description": "The timezone for the available slots. It must be a tz identifier like America/New_York, Asia/Kolkata, Cuba, etc.Note: We have regional calenders for APAC, EMEA, and North America. Please use the timezone accordingly. The region must be asked explicitly from the user and hence confirmed too.",
                 },
                 "locale": {
                     "type": "string",