fix comments

src/snowflake/cli/_plugins/spcs/common.py

@@ -201,7 +201,7 @@ def format_event_row(event_dict: dict) -> dict:
             "DATABASE NAME": database_name,
             "SCHEMA NAME": schema_name,
             "SERVICE NAME": service_name,
-            "INSTANCE NAME": instance_name,
+            "INSTANCE ID": instance_name,
             "CONTAINER NAME": container_name,
             "SEVERITY": severity,
             "EVENT NAME": event_name,
@@ -232,7 +232,7 @@ def format_metric_row(metric_dict: dict) -> dict:
             "DATABASE NAME": database_name,
             "SCHEMA NAME": schema_name,
             "SERVICE NAME": service_name,
-            "INSTANCE NAME": instance_name,
+            "INSTANCE ID": instance_name,
             "CONTAINER NAME": container_name,
             "METRIC NAME": metric_name,
             "METRIC VALUE": metric_value,

src/snowflake/cli/_plugins/spcs/services/commands.py

@@ -322,12 +322,12 @@ def events(
         help="Fetch events that are older than this time ago, in Snowflake interval syntax.",
     ),
     first: int = typer.Option(
-        default=-1,
+        default=None,
         show_default=False,
         help="Fetch only the first N events. Cannot be used with --last.",
     ),
     last: int = typer.Option(
-        default=-1,
+        default=None,
         show_default=False,
         help="Fetch only the last N events. Cannot be used with --first.",
     ),
@@ -339,13 +339,16 @@ def events(
     ),
     **options,
 ):
+    """
+    Retrieve platform events for a service container.
+    """
     if FeatureFlag.ENABLE_SPCS_SERVICE_EVENTS.is_disabled():
         raise FeatureNotEnabledError(
             "ENABLE_SPCS_SERVICE_EVENTS",
             "Service events collection from SPCS event table is disabled.",
         )
 
-    if first >= 0 and last >= 0:
+    if first is not None and last is not None:
         raise IncompatibleParametersError(["--first", "--last"])
 
     manager = ServiceManager()
@@ -359,6 +362,10 @@ def events(
         last=last,
         show_all_columns=show_all_columns,
     )
+
+    if not events:
+        return MessageResult("No events found.")
+
     return CollectionResult(events)
 
 
@@ -393,6 +400,9 @@ def metrics(
     ),
     **options,
 ):
+    """
+    Retrieve platform metrics for a service container.
+    """
     if FeatureFlag.ENABLE_SPCS_SERVICE_METRICS.is_disabled():
         raise FeatureNotEnabledError(
             "ENABLE_SPCS_SERVICE_METRICS",

src/snowflake/cli/_plugins/spcs/services/manager.py

@@ -223,8 +223,8 @@ def get_events(
         container_name: str,
         since: str | datetime | None = None,
         until: str | datetime | None = None,
-        first: int = -1,
-        last: int = -1,
+        first: Optional[int] = None,
+        last: Optional[int] = None,
         show_all_columns: bool = False,
     ):
 
@@ -234,8 +234,8 @@ def get_events(
         )
         since_clause, until_clause = build_time_clauses(since, until)
 
-        first_clause = f"limit {first}" if first >= 0 else ""
-        last_clause = f"limit {last}" if last >= 0 else ""
+        first_clause = f"limit {first}" if first is not None else ""
+        last_clause = f"limit {last}" if last is not None else ""
 
         query = f"""\
                      select *