diff --git a/api/core/mcp/server/streamable_http.py b/api/core/mcp/server/streamable_http.py
index 1c2cf570e..20ff7e752 100644
--- a/api/core/mcp/server/streamable_http.py
+++ b/api/core/mcp/server/streamable_http.py
@@ -148,9 +148,7 @@ class MCPServerStreamableHTTPRequestHandler:
         if not self.end_user:
             raise ValueError("User not found")
         request = cast(types.CallToolRequest, self.request.root)
-        args = request.params.arguments
-        if not args:
-            raise ValueError("No arguments provided")
+        args = request.params.arguments or {}
         if self.app.mode in {AppMode.WORKFLOW.value}:
             args = {"inputs": args}
         elif self.app.mode in {AppMode.COMPLETION.value}: