Add documentation

Author: pritishpai

docs/ucx/docs/reference/workflows/index.mdx

@@ -98,9 +98,7 @@ See [this guide](/docs/reference/assessment) for more details.
 Proceed to the [group migration workflow](/docs/reference/workflows#group-migration-workflow) below or go back to the
 [migration process diagram](/docs/process/).
 
-The UCX assessment workflow is designed to only run once, re-running will **not** update the existing results. If the
-inventory and findings for a workspace need to be updated then first reinstall UCX by [uninstalling](/docs/installation#uninstall-ucx)
-and [installing](/docs/installation) it again.
+> **⚠️ Caution:** Re-running the UCX assessment workflow will **overwrite existing results**. For large workspaces, this process can take a significant amount of time and consume substantial resources. Only re-run if you are certain it is necessary.
 
 ## Group migration workflow