diff --git a/docs/en/resources/tools/looker/looker-query.md b/docs/en/resources/tools/looker/looker-query.md
index 53f7790d13..3f5f443dc7 100644
--- a/docs/en/resources/tools/looker/looker-query.md
+++ b/docs/en/resources/tools/looker/looker-query.md
@@ -61,6 +61,8 @@ tools:
           "field.id2": "condition2", ...}. Do not put the field.id in
           quotes. Filter expressions can be found at
           https://cloud.google.com/looker/docs/filter-expressions.
+          If the condition is a string that contains a comma, use a second
+          set of quotes. For example, {"user.city": "'New York, NY'"}.
 
           Sorts can be specified like [ "field.id desc 0" ].
 
diff --git a/internal/prebuiltconfigs/tools/looker.yaml b/internal/prebuiltconfigs/tools/looker.yaml
index 73bc3b50ca..08abfe8d83 100644
--- a/internal/prebuiltconfigs/tools/looker.yaml
+++ b/internal/prebuiltconfigs/tools/looker.yaml
@@ -118,6 +118,8 @@ tools:
           quotes. Filter expressions can be found at
           https://cloud.google.com/looker/docs/filter-expressions. There
           is one mistake in that, however, Use `not null` instead of `-NULL`.
+          If the condition is a string that contains a comma, use a second
+          set of quotes. For example, {"user.city": "'New York, NY'"}.
 
           Sorts can be specified like [ "field.id desc 0" ].
 
@@ -843,4 +845,4 @@ toolsets:
         - get_project_file
         - create_project_file
         - update_project_file
-        - delete_project_file
\ No newline at end of file
+        - delete_project_file