diff --git a/.github/workflows/test_validate_plugins.py b/.github/workflows/test_validate_plugins.py
index 6887fc3..5400fd2 100644
--- a/.github/workflows/test_validate_plugins.py
+++ b/.github/workflows/test_validate_plugins.py
@@ -66,6 +66,27 @@ class AllowedTagsTests(unittest.TestCase):
         self.assertTrue(any("tags[2] must be a non-empty string" in error for error in errors))
 
 
+class DescriptionTests(unittest.TestCase):
+    def validate_description(self, description: object) -> list[str]:
+        validator = validate_plugins.Validator(Path("/repo"))
+        validator.validate_description(Path("/repo/example/plugin.toml"), description)
+        return validator.errors
+
+    def test_accepts_description_at_limit(self) -> None:
+        self.assertEqual(
+            self.validate_description("x" * validate_plugins.DESCRIPTION_MAX_CHARS),
+            [],
+        )
+
+    def test_rejects_description_over_limit(self) -> None:
+        errors = self.validate_description(
+            "x" * (validate_plugins.DESCRIPTION_MAX_CHARS + 1)
+        )
+        self.assertEqual(len(errors), 1)
+        self.assertIn("is 121 characters", errors[0])
+        self.assertIn("at or below 120", errors[0])
+
+
 class PluginConfigAccessorTests(unittest.TestCase):
     def test_accepts_universal_accessor(self) -> None:
         self.assertEqual(
diff --git a/.github/workflows/validate-plugins.py b/.github/workflows/validate-plugins.py
index a5046db..c1cf05c 100644
--- a/.github/workflows/validate-plugins.py
+++ b/.github/workflows/validate-plugins.py
@@ -14,6 +14,7 @@ from typing import Any
 DEFAULT_ROOT = Path(__file__).resolve().parents[2]
 SEMVER_RE = re.compile(r"^\d+\.\d+\.\d+$")
 LAUNCHER_PREFIX_RE = re.compile(r"^[a-z]+$")
+DESCRIPTION_MAX_CHARS = 120
 ALLOWED_TAGS = {
     "ai",
     "animation",
@@ -475,6 +476,18 @@ class Validator:
                     f"tags[{index}] '{tag}' is not an allowed tag",
                 )
 
+    def validate_description(self, manifest_path: Path, value: Any) -> None:
+        if not is_non_empty_string(value):
+            return
+
+        length = len(value)
+        if length > DESCRIPTION_MAX_CHARS:
+            self.add_error(
+                manifest_path,
+                f"root field 'description' is {length} characters; "
+                f"keep catalog descriptions at or below {DESCRIPTION_MAX_CHARS}",
+            )
+
     def validate_root_fields(self, manifest_path: Path, manifest: dict[str, Any]) -> None:
         unknown = sorted(set(manifest) - ROOT_FIELDS)
         for field in unknown:
@@ -502,6 +515,9 @@ class Validator:
         if "tags" in manifest:
             self.validate_tags(manifest_path, manifest["tags"])
 
+        if "description" in manifest:
+            self.validate_description(manifest_path, manifest["description"])
+
         if "deprecated" in manifest and not isinstance(manifest["deprecated"], bool):
             self.add_error(manifest_path, "root field 'deprecated' must be a bool")
 
diff --git a/README.md b/README.md
index 5be7ad9..28dd7ff 100644
--- a/README.md
+++ b/README.md
@@ -149,6 +149,7 @@ Open a PR against `main`. CI validates your manifest, entry scripts, required fi
 - `version` is semver and gets bumped on every change to the plugin.
 - `min_noctalia` is the Noctalia version you actually tested against. Users on older builds are then told the plugin
   needs an upgrade instead of getting a broken install.
+- `description` is concise catalog copy, limited to 120 characters. Put feature details in the plugin's README.
 - `license` is set in `plugin.toml`. You keep the copyright on your plugin; if it is not MIT, put a `LICENSE` file in
   your plugin directory. There is no repo-wide license covering contributed plugins.
 - Screenshots or a short video for anything with a visual surface.
diff --git a/sharednd/plugin.toml b/sharednd/plugin.toml
index d57ddd1..9d8f09d 100644
--- a/sharednd/plugin.toml
+++ b/sharednd/plugin.toml
@@ -13,14 +13,14 @@
 
 id = "whyoolw/sharednd"
 name = "ShareDND"
-version = "1.1.0"
+version = "1.1.1"
 min_noctalia = "5.0.0"
 author = "whyoolw"
 license = "MIT"
 dependencies = ["niri"]
 tags = ["privacy", "niri"]
 icon = "screen-share"
-description = "Enables notification Do Not Disturb while the screen is shared (niri screencast) and turns notifications back on when sharing stops. Requires niri."
+description = "Automatically enables notification Do Not Disturb while a niri screencast is active."
 
 [[setting]]
 key = "only_active"