diff --git a/contributing/samples/mcp_agent/agent.py b/contributing/samples/mcp_agent/agent.py
index 660c98c..a14ab43 100755
--- a/contributing/samples/mcp_agent/agent.py
+++ b/contributing/samples/mcp_agent/agent.py
@@ -19,10 +19,16 @@ from google.adk.agents.llm_agent import LlmAgent
 from google.adk.tools.mcp_tool.mcp_toolset import MCPToolset
 from google.adk.tools.mcp_tool.mcp_toolset import StdioServerParameters
 
+_allowed_path = os.path.dirname(os.path.abspath(__file__))
+
 root_agent = LlmAgent(
     model='gemini-2.0-flash',
     name='enterprise_assistant',
-    instruction='Help user accessing their file systems',
+    instruction=f"""\
+Help user accessing their file systems.
+
+Allowed directory: {_allowed_path}
+    """,
     tools=[
         MCPToolset(
             connection_params=StdioServerParameters(
@@ -30,7 +36,7 @@ root_agent = LlmAgent(
                 args=[
                     '-y',  # Arguments for the command
                     '@modelcontextprotocol/server-filesystem',
-                    os.path.dirname(os.path.abspath(__file__)),
+                    _allowed_path,
                 ],
             ),
             # don't want agent to do write operation