diff --git a/api/models/workflow.py b/api/models/workflow.py
index 51f2f4cc9f..5a67fa47a8 100644
--- a/api/models/workflow.py
+++ b/api/models/workflow.py
@@ -245,6 +245,13 @@ class Workflow(Base):
 
     @property
     def tool_published(self) -> bool:
+        """
+        DEPRECATED: This property is not accurate for determining if a workflow is published as a tool.
+        It only checks if there's a WorkflowToolProvider for the app, not if this specific workflow version
+        is the one being used by the tool.
+
+        For accurate checking, use a direct query with tenant_id, app_id, and version.
+        """
         from models.tools import WorkflowToolProvider
 
         return (
diff --git a/api/services/workflow_service.py b/api/services/workflow_service.py
index b88c7b296d..5cd5c55746 100644
--- a/api/services/workflow_service.py
+++ b/api/services/workflow_service.py
@@ -28,6 +28,7 @@ from extensions.ext_database import db
 from models.account import Account
 from models.enums import CreatedByRole
 from models.model import App, AppMode
+from models.tools import WorkflowToolProvider
 from models.workflow import (
     Workflow,
     WorkflowNodeExecution,
@@ -523,8 +524,19 @@ class WorkflowService:
             # Cannot delete a workflow that's currently in use by an app
             raise WorkflowInUseError(f"Cannot delete workflow that is currently in use by app '{app.name}'")
 
-        # Check if this workflow is published as a tool
-        if workflow.tool_published:
+        # Don't use workflow.tool_published as it's not accurate for specific workflow versions
+        # Check if there's a tool provider using this specific workflow version
+        tool_provider = (
+            session.query(WorkflowToolProvider)
+            .filter(
+                WorkflowToolProvider.tenant_id == workflow.tenant_id,
+                WorkflowToolProvider.app_id == workflow.app_id,
+                WorkflowToolProvider.version == workflow.version,
+            )
+            .first()
+        )
+
+        if tool_provider:
             # Cannot delete a workflow that's published as a tool
             raise WorkflowInUseError("Cannot delete workflow that is published as a tool")
 
diff --git a/api/tests/unit_tests/services/workflow/test_workflow_deletion.py b/api/tests/unit_tests/services/workflow/test_workflow_deletion.py
index 56efcccc78..223020c2c5 100644
--- a/api/tests/unit_tests/services/workflow/test_workflow_deletion.py
+++ b/api/tests/unit_tests/services/workflow/test_workflow_deletion.py
@@ -40,6 +40,10 @@ def workflow_setup():
 
 def test_delete_workflow_success(workflow_setup):
     # Setup mocks
+
+    # Mock the tool provider query to return None (not published as a tool)
+    workflow_setup["session"].query.return_value.filter.return_value.first.return_value = None
+
     workflow_setup["session"].scalar = MagicMock(
         side_effect=[workflow_setup["workflow"], None]
     )  # Return workflow first, then None for app
@@ -97,7 +101,12 @@ def test_delete_workflow_in_use_by_app_error(workflow_setup):
 
 def test_delete_workflow_published_as_tool_error(workflow_setup):
     # Setup mocks
-    workflow_setup["workflow"].tool_published = True
+    from models.tools import WorkflowToolProvider
+
+    # Mock the tool provider query
+    mock_tool_provider = MagicMock(spec=WorkflowToolProvider)
+    workflow_setup["session"].query.return_value.filter.return_value.first.return_value = mock_tool_provider
+
     workflow_setup["session"].scalar = MagicMock(
         side_effect=[workflow_setup["workflow"], None]
     )  # Return workflow first, then None for app