diff --git a/src/crewai_tools/adapters/enterprise_adapter.py b/src/crewai_tools/adapters/enterprise_adapter.py
index 6799d7ea8..96d64af8b 100644
--- a/src/crewai_tools/adapters/enterprise_adapter.py
+++ b/src/crewai_tools/adapters/enterprise_adapter.py
@@ -37,34 +37,18 @@ class EnterpriseActionTool(BaseTool):
         enterprise_action_kit_project_url: str = ENTERPRISE_ACTION_KIT_PROJECT_URL,
         enterprise_action_kit_project_id: str = ENTERPRISE_ACTION_KIT_PROJECT_ID,
     ):
-        schema_props = (
-            action_schema.get("function", {})
-            .get("parameters", {})
-            .get("properties", {})
-        )
-        required = (
-            action_schema.get("function", {}).get("parameters", {}).get("required", [])
-        )
+        schema_props, required = self._extract_schema_info(action_schema)
 
         # Define field definitions for the model
         field_definitions = {}
         for param_name, param_details in schema_props.items():
-            param_type = str  # Default to string type
             param_desc = param_details.get("description", "")
             is_required = param_name in required
+            is_nullable, param_type = self._analyze_field_type(param_details)
 
-            # Basic type mapping (can be extended)
-            if param_details.get("type") == "integer":
-                param_type = int
-            elif param_details.get("type") == "number":
-                param_type = float
-            elif param_details.get("type") == "boolean":
-                param_type = bool
-
-            # Create field with appropriate type and config
-            field_definitions[param_name] = (
-                param_type if is_required else Optional[param_type],
-                Field(description=param_desc),
+            # Create field definition based on nullable and required status
+            field_definitions[param_name] = self._create_field_definition(
+                param_type, is_required, is_nullable, param_desc
             )
 
         # Create the model
@@ -89,9 +73,97 @@ class EnterpriseActionTool(BaseTool):
         if enterprise_action_kit_project_url is not None:
             self.enterprise_action_kit_project_url = enterprise_action_kit_project_url
 
+    def _extract_schema_info(
+        self, action_schema: Dict[str, Any]
+    ) -> tuple[Dict[str, Any], List[str]]:
+        """Extract schema properties and required fields from action schema."""
+        schema_props = (
+            action_schema.get("function", {})
+            .get("parameters", {})
+            .get("properties", {})
+        )
+        required = (
+            action_schema.get("function", {}).get("parameters", {}).get("required", [])
+        )
+        return schema_props, required
+
+    def _analyze_field_type(self, param_details: Dict[str, Any]) -> tuple[bool, type]:
+        """Analyze field type and nullability from parameter details."""
+        is_nullable = False
+        param_type = str  # Default type
+
+        if "anyOf" in param_details:
+            any_of_types = param_details["anyOf"]
+            is_nullable = any(t.get("type") == "null" for t in any_of_types)
+            non_null_types = [t for t in any_of_types if t.get("type") != "null"]
+            if non_null_types:
+                first_type = non_null_types[0].get("type", "string")
+                param_type = self._map_json_type_to_python(
+                    first_type, non_null_types[0]
+                )
+        else:
+            json_type = param_details.get("type", "string")
+            param_type = self._map_json_type_to_python(json_type, param_details)
+            is_nullable = json_type == "null"
+
+        return is_nullable, param_type
+
+    def _create_field_definition(
+        self, param_type: type, is_required: bool, is_nullable: bool, param_desc: str
+    ) -> tuple:
+        """Create Pydantic field definition based on type, requirement, and nullability."""
+        if is_nullable:
+            return (
+                Optional[param_type],
+                Field(default=None, description=param_desc),
+            )
+        elif is_required:
+            return (
+                param_type,
+                Field(description=param_desc),
+            )
+        else:
+            return (
+                Optional[param_type],
+                Field(default=None, description=param_desc),
+            )
+
+    def _map_json_type_to_python(
+        self, json_type: str, param_details: Dict[str, Any]
+    ) -> type:
+        """Map JSON schema types to Python types."""
+        type_mapping = {
+            "string": str,
+            "integer": int,
+            "number": float,
+            "boolean": bool,
+            "array": list,
+            "object": dict,
+        }
+        return type_mapping.get(json_type, str)
+
+    def _get_required_nullable_fields(self) -> List[str]:
+        """Get a list of required nullable fields from the action schema."""
+        schema_props, required = self._extract_schema_info(self.action_schema)
+
+        required_nullable_fields = []
+        for param_name in required:
+            param_details = schema_props.get(param_name, {})
+            is_nullable, _ = self._analyze_field_type(param_details)
+            if is_nullable:
+                required_nullable_fields.append(param_name)
+
+        return required_nullable_fields
+
     def _run(self, **kwargs) -> str:
         """Execute the specific enterprise action with validated parameters."""
         try:
+            required_nullable_fields = self._get_required_nullable_fields()
+
+            for field_name in required_nullable_fields:
+                if field_name not in kwargs:
+                    kwargs[field_name] = None
+
             params = {k: v for k, v in kwargs.items() if v is not None}
 
             api_url = f"{self.enterprise_action_kit_project_url}/{self.enterprise_action_kit_project_id}/actions"