diff --git a/libs/labelbox/src/labelbox/schema/tool_building/base_step_reasoning_tool.py b/libs/labelbox/src/labelbox/schema/tool_building/base_step_reasoning_tool.py
index 624e951a7..4d7ce54c5 100644
--- a/libs/labelbox/src/labelbox/schema/tool_building/base_step_reasoning_tool.py
+++ b/libs/labelbox/src/labelbox/schema/tool_building/base_step_reasoning_tool.py
@@ -76,7 +76,7 @@ class _BaseStepReasoningTool(ABC):
     schema_id: Optional[str] = None
     feature_schema_id: Optional[str] = None
     color: Optional[str] = None
-    required: bool = False
+    required: bool = False  # This attribute is for consistency with other tools and backend, default is False
 
     def __post_init__(self):
         if not self.name.strip():
diff --git a/libs/labelbox/src/labelbox/schema/tool_building/prompt_issue_tool.py b/libs/labelbox/src/labelbox/schema/tool_building/prompt_issue_tool.py
index 5b9b55d9c..1a965ff95 100644
--- a/libs/labelbox/src/labelbox/schema/tool_building/prompt_issue_tool.py
+++ b/libs/labelbox/src/labelbox/schema/tool_building/prompt_issue_tool.py
@@ -36,7 +36,7 @@ class PromptIssueTool:
 
     name: str
     type: ToolType = field(default=ToolType.PROMPT_ISSUE, init=False)
-    required: bool = False
+    required: bool = False  # This attribute is for consistency with other tools and backend, default is False
     schema_id: Optional[str] = None
     feature_schema_id: Optional[str] = None
     color: Optional[str] = None
@@ -64,11 +64,20 @@ def _validate_classifications(
         if (
             len(classifications) != 1
             or classifications[0].class_type != Classification.Type.CHECKLIST
+            or len(classifications[0].options) < 1
         ):
             return False
         return True
 
     def asdict(self) -> Dict[str, Any]:
+        classifications_valid = self._validate_classifications(
+            self.classifications
+        )
+        if not classifications_valid:
+            raise ValueError(
+                "Classifications for Prompt Issue Tool are invalid"
+            )
+
         return {
             "tool": self.type.value,
             "name": self.name,
diff --git a/libs/labelbox/tests/integration/test_ontology.py b/libs/labelbox/tests/integration/test_ontology.py
index febfdacfd..d56f54958 100644
--- a/libs/labelbox/tests/integration/test_ontology.py
+++ b/libs/labelbox/tests/integration/test_ontology.py
@@ -3,9 +3,9 @@
 
 import pytest
 
-from labelbox import MediaType, OntologyBuilder, Tool
+from labelbox import MediaType, OntologyBuilder, OntologyKind, Tool
 from labelbox.orm.model import Entity
-from labelbox.schema.tool_building.classification import Classification
+from labelbox.schema.tool_building.classification import Classification, Option
 from labelbox.schema.tool_building.fact_checking_tool import (
     FactCheckingTool,
 )
@@ -488,3 +488,33 @@ def test_prompt_issue_ontology(chat_evaluation_ontology):
     classification = prompt_issue_tool.classifications[0]
     assert classification.class_type == Classification.Type.CHECKLIST
     assert len(classification.options) == 3  # Check number of options
+
+
+def test_invalid_prompt_issue_ontology(client):
+    tool = PromptIssueTool(name="Prompt Issue Tool")
+
+    option1 = Option(value="value")
+    radio_class = Classification(
+        class_type=Classification.Type.RADIO,
+        name="radio-class",
+        options=[option1],
+    )
+    text_class = Classification(
+        class_type=Classification.Type.TEXT, name="text-class"
+    )
+
+    tool.classifications.append(radio_class)
+    tool.classifications.append(text_class)
+
+    builder = OntologyBuilder(
+        tools=[tool],
+    )
+    with pytest.raises(
+        ValueError, match="Classifications for Prompt Issue Tool are invalid"
+    ):
+        client.create_ontology(
+            name="plt-1710",
+            media_type=MediaType.Conversational,
+            ontology_kind=OntologyKind.ModelEvaluation,
+            normalized=builder.asdict(),
+        )
diff --git a/libs/labelbox/tests/unit/test_unit_prompt_issue_tool.py b/libs/labelbox/tests/unit/test_unit_prompt_issue_tool.py
index 04dc89668..5a18d5248 100644
--- a/libs/labelbox/tests/unit/test_unit_prompt_issue_tool.py
+++ b/libs/labelbox/tests/unit/test_unit_prompt_issue_tool.py
@@ -53,6 +53,9 @@ def test_as_dict():
     }
     assert tool_dict == expected_dict
 
+
+def test_classification_validation():
+    tool = PromptIssueTool(name="Prompt Issue Tool")
     with pytest.raises(ValueError):
         tool.classifications = [
             Classification(Classification.Type.TEXT, "prompt_issue")