diff --git a/doc/development/documentation/styleguide/word_list.md b/doc/development/documentation/styleguide/word_list.md
index 83330f0cb622303ba14ab095e06f2468b4a583f9..7c21a3d6eaa2f838665b724cec29b8e600fb7362 100644
--- a/doc/development/documentation/styleguide/word_list.md
+++ b/doc/development/documentation/styleguide/word_list.md
@@ -966,6 +966,22 @@ You can use **GA** to indicate general availability if you spell it out on first
 
 Do not make **GitLab** possessive (GitLab's). This guidance follows [GitLab Trademark Guidelines](https://handbook.gitlab.com/handbook/marketing/brand-and-product-marketing/brand/brand-activation/trademark-guidelines/).
 
+Do not put **GitLab** next to the name of another third-party tool or brand.
+For example, do not use:
+
+- GitLab Chrome extension
+- GitLab Kubernetes agent
+
+Instead, use:
+
+- GitLab extension for Chrome
+- GitLab agent for Kubernetes
+
+Putting the brand names next to each other can imply ownership or partnership, which we don't want to do,
+unless we've gone through a legal review and have been told to promote the partnership.
+
+This guidance follows the [Use of Third-party Trademarks](https://handbook.gitlab.com/handbook/legal/policies/product-third-party-trademarks-guidelines/#dos--donts-for-use-of-third-party-trademarks-in-gitlab).
+
 ## GitLab Dedicated
 
 Use **GitLab Dedicated** to refer to the product offering. It refers to a GitLab instance that's hosted and managed by GitLab for customers.