diff --git a/dialog/_src/string/tool_grammar.py b/dialog/_src/string/tool_grammar.py
index e8c239f..c20b36a 100644
--- a/dialog/_src/string/tool_grammar.py
+++ b/dialog/_src/string/tool_grammar.py
@@ -202,7 +202,7 @@ def _parser() -> lark.Lark:
       start:  TOOL_NAME dict
 
       # Call name (e.g. `declaration:foo`)
-      TOOL_NAME: CNAME COLON /[ a-zA-Z0-9_:\/\\.()-]+/
+      TOOL_NAME: CNAME COLON /[ a-zA-Z0-9_:'"\/\\.()-]+/
       # TOOL_NAME: /[^{]+/  # Match all characters until `{`.
 
       # Body