fix(cloudwatch-mcp-server): make storedBytes optional in LogGroupMetadata

src/cloudwatch-mcp-server/awslabs/cloudwatch_mcp_server/cloudwatch_logs/models.py

@@ -25,7 +25,7 @@ class LogGroupMetadata(BaseModel):
     creationTime: str = Field(..., description='ISO 8601 timestamp when the log group was created')
     retentionInDays: Optional[int] = Field(default=None, description='Retention period, if set')
     metricFilterCount: int = Field(..., description='Number of metric filters')
-    storedBytes: int = Field(..., description='The number of bytes stored')
+    storedBytes: Optional[int] = Field(default=None, description='The number of bytes stored')
     kmsKeyId: Optional[str] = Field(
         default=None, description='KMS Key Id used for data encryption, if set'
     )

src/cloudwatch-mcp-server/tests/cloudwatch_logs/test_logs_models.py

@@ -40,6 +40,35 @@ def test_convert_to_iso8601_returns_string_unchanged(self):
         # Verify the string timestamp was returned unchanged
         assert log_group.creationTime == '2023-01-01T00:00:00+00:00'
 
+    def test_stored_bytes_optional(self):
+        """Test that storedBytes is optional since AWS API may omit it."""
+        log_group_data = {
+            'logGroupName': '/aws/test/group',
+            'creationTime': '2023-01-01T00:00:00+00:00',
+            'metricFilterCount': 0,
+            'logGroupClass': 'STANDARD',
+            'logGroupArn': 'arn:aws:logs:us-east-1:123456789012:log-group:/aws/test/group',
+        }
+
+        log_group = LogGroupMetadata(**log_group_data)
+
+        assert log_group.storedBytes is None
+
+    def test_stored_bytes_present(self):
+        """Test that storedBytes is correctly set when provided."""
+        log_group_data = {
+            'logGroupName': '/aws/test/group',
+            'creationTime': '2023-01-01T00:00:00+00:00',
+            'metricFilterCount': 0,
+            'storedBytes': 2048,
+            'logGroupClass': 'STANDARD',
+            'logGroupArn': 'arn:aws:logs:us-east-1:123456789012:log-group:/aws/test/group',
+        }
+
+        log_group = LogGroupMetadata(**log_group_data)
+
+        assert log_group.storedBytes == 2048
+
 
 class TestLogAnomaly:
     """Tests for LogAnomaly model."""