diff --git a/packages/backend/src/server/api/endpoints/notes/children.ts b/packages/backend/src/server/api/endpoints/notes/children.ts
index dc536df62e..3615df0249 100644
--- a/packages/backend/src/server/api/endpoints/notes/children.ts
+++ b/packages/backend/src/server/api/endpoints/notes/children.ts
@@ -10,6 +10,7 @@ export const meta = {
 
 	requireCredential: false,
 	requireCredentialPrivateMode: true,
+	description: "Get threaded/chained replies to a note",
 
 	res: {
 		type: "array",
diff --git a/packages/backend/src/server/api/endpoints/notes/conversation.ts b/packages/backend/src/server/api/endpoints/notes/conversation.ts
index 47c6727364..67927794d9 100644
--- a/packages/backend/src/server/api/endpoints/notes/conversation.ts
+++ b/packages/backend/src/server/api/endpoints/notes/conversation.ts
@@ -9,6 +9,7 @@ export const meta = {
 
 	requireCredential: false,
 	requireCredentialPrivateMode: true,
+	description: "Get conversation of a note thread/chain by a reply",
 
 	res: {
 		type: "array",
@@ -34,7 +35,7 @@ export const meta = {
 export const paramDef = {
 	type: "object",
 	properties: {
-		noteId: { type: "string", format: "misskey:id" },
+		noteId: { type: "string", format: "misskey:id", description: "Should be a reply" },
 		limit: { type: "integer", minimum: 1, maximum: 100, default: 10 },
 		offset: { type: "integer", default: 0 },
 	},