diff --git a/src/mcp_gsuite/tools_gmail.py b/src/mcp_gsuite/tools_gmail.py
index 181414a..2b47feb 100644
--- a/src/mcp_gsuite/tools_gmail.py
+++ b/src/mcp_gsuite/tools_gmail.py
@@ -42,7 +42,6 @@ def get_tool_description(self) -> Tool:
                             - 'newer_than:2d' for emails from last 2 days
                             - 'has:attachment' for emails with attachments
                             If not provided, returns recent emails without filtering.""",
-                        "required": False
                     },
                     "max_results": {
                         "type": "integer",