diff --git a/action/README.md b/action/README.md
index 5921acfe..0a09132f 100644
--- a/action/README.md
+++ b/action/README.md
@@ -26,10 +26,11 @@ steps:
 ```
 
 Installing plugins requires a Flux version with plugin support (v2.9.0 or later).
-The `plugins` input accepts one plugin per line in `<name>@<version|digest>`
-format. The `plugin-dir` input is only used when `plugins` is set; when
-plugins are installed, the action exports `FLUXCD_PLUGINS` for subsequent
-steps.
+The `plugins` input accepts one plugin per line in `<name>`,
+`<name>@<version>`, or `<name>@<digest>` format. Entries without a version or
+digest install the latest version from the catalog. The `plugin-dir` input is
+only used when `plugins` is set; when plugins are installed, the action exports
+`FLUXCD_PLUGINS` for subsequent steps.
 
 The Flux GitHub Action can be used to automate various tasks in CI, such as:
 
diff --git a/action/action.yml b/action/action.yml
index c81cfddb..330166f7 100644
--- a/action/action.yml
+++ b/action/action.yml
@@ -14,7 +14,9 @@ inputs:
     deprecationMessage: "No longer required, action will now detect runner arch."
   plugins:
     description: >
-      Plugins to install alongside Flux. One per line: `<name>@<version|digest>`. Example: `mirror@0.0.1`
+      Plugins to install alongside Flux. One per line: `<name>`, `<name>@<version>` or
+      `<name>@<digest>`. Entries without a version or digest install the latest
+      version from the catalog. Example: `mirror@0.0.1`
     required: false
   plugin-dir:
     description: >