diff --git a/src/serena/tools/workflow_tools.py b/src/serena/tools/workflow_tools.py
index 6172cc33..38cc19be 100644
--- a/src/serena/tools/workflow_tools.py
+++ b/src/serena/tools/workflow_tools.py
@@ -5,7 +5,7 @@ Tools supporting the general workflow of the agent
 import json
 import platform
 
-from serena.tools import Tool, ToolMarkerDoesNotRequireActiveProject
+from serena.tools import Tool, ToolMarkerDoesNotRequireActiveProject, ToolMarkerOptional
 
 
 class CheckOnboardingPerformedTool(Tool):
@@ -122,7 +122,7 @@ class PrepareForNewConversationTool(Tool):
         return self.prompt_factory.create_prepare_for_new_conversation()
 
 
-class InitialInstructionsTool(Tool, ToolMarkerDoesNotRequireActiveProject):
+class InitialInstructionsTool(Tool, ToolMarkerDoesNotRequireActiveProject, ToolMarkerOptional):
     """
     Gets the initial instructions for the current project.
     Should only be used in settings where the system prompt cannot be set,