update docs to be clear that compression-level only applies to save

README.md

@@ -87,7 +87,7 @@ If you are using a `self-hosted` Windows runner, `GNU tar` and `zstd` are requir
 * `key` - An explicit key for a cache entry. See [creating a cache key](#creating-a-cache-key).
 * `path` - A list of files, directories, and wildcard patterns to cache and restore. See [`@actions/glob`](https://github.com/actions/toolkit/tree/main/packages/glob) for supported patterns.
 * `restore-keys` - An ordered multiline string listing the prefix-matched keys, that are used for restoring stale cache if no cache hit occurred for key.
-* `compression-level` - Compression level to use when creating cache archives. Use `0` for no compression and `9` for maximum compression. Defaults to the compression tool's standard level when unset.
+* `compression-level` - Compression level to use when creating cache archives (applies to the save step of the cache action). Use `0` for no compression and `9` for maximum compression. Defaults to the compression tool's standard level when unset.
 * `enableCrossOsArchive` - An optional boolean when enabled, allows Windows runners to save or restore caches that can be restored or saved respectively on other platforms. Default: `false`
 * `fail-on-cache-miss` - Fail the workflow if cache entry is not found. Default: `false`
 * `lookup-only` - If true, only checks if cache entry exists and skips download. Does not change save cache behavior. Default: `false`

action.yml

@@ -15,7 +15,7 @@ inputs:
     description: 'The chunk size used to split up large files during upload, in bytes'
     required: false
   compression-level:
-    description: 'Compression level used when creating cache archives. Set 0 for no compression and 9 for maximum compression. Defaults to the compression tool defaults when unset'
+    description: 'Compression level used when creating cache archives (save step only). Set 0 for no compression and 9 for maximum compression. Defaults to the compression tool defaults when unset'
     required: false
   enableCrossOsArchive:
     description: 'An optional boolean when enabled, allows windows runners to save or restore caches that can be restored or saved respectively on other platforms'

save/README.md

@@ -9,7 +9,7 @@ The save action saves a cache. It works similarly to the `cache` action except t
 * `key` - An explicit key for a cache entry. See [creating a cache key](../README.md#creating-a-cache-key).
 * `path` - A list of files, directories, and wildcard patterns to cache. See [`@actions/glob`](https://github.com/actions/toolkit/tree/main/packages/glob) for supported patterns.
 * `upload-chunk-size` - The chunk size used to split up large files during upload, in bytes
-* `compression-level` - Compression level to use when creating cache archives. Use `0` for no compression and `9` for maximum compression. Defaults to the compression tool's standard level when unset.
+* `compression-level` - Compression level to use when creating cache archives (save-only action). Use `0` for no compression and `9` for maximum compression. Defaults to the compression tool's standard level when unset.
 
 ### Outputs
 

save/action.yml

@@ -12,7 +12,7 @@ inputs:
     description: 'The chunk size used to split up large files during upload, in bytes'
     required: false
   compression-level:
-    description: 'Compression level used when creating cache archives. Set 0 for no compression and 9 for maximum compression. Defaults to the compression tool defaults when unset'
+    description: 'Compression level used when creating cache archives (save-only action). Set 0 for no compression and 9 for maximum compression. Defaults to the compression tool defaults when unset'
     required: false
   enableCrossOsArchive:
     description: 'An optional boolean when enabled, allows windows runners to save caches that can be restored on other platforms'