diff --git a/internal/app/root_help_test.go b/internal/app/root_help_test.go
index 02d8e487..d83f31be 100644
--- a/internal/app/root_help_test.go
+++ b/internal/app/root_help_test.go
@@ -47,6 +47,25 @@ func TestRootHelpHidesCompatibilityOnlyCommands(t *testing.T) {
 	}
 }
 
+func TestCalendarEventCreateHelpKeepsRoomsStringMetavar(t *testing.T) {
+	cmd := NewRootCommand()
+	var out bytes.Buffer
+	cmd.SetOut(&out)
+	cmd.SetErr(&out)
+	cmd.SetArgs([]string{"calendar", "event", "create", "--help"})
+	if err := cmd.Execute(); err != nil {
+		t.Fatalf("calendar event create --help: %v\n%s", err, out.String())
+	}
+
+	help := out.String()
+	if !strings.Contains(help, "--rooms string") {
+		t.Fatalf("calendar event create help missing string metavar for --rooms:\n%s", help)
+	}
+	if strings.Contains(help, "--rooms room search") {
+		t.Fatalf("calendar event create help treated description text as --rooms metavar:\n%s", help)
+	}
+}
+
 func TestRootKeepsMainBranchChatCompatibilityCommands(t *testing.T) {
 	root := NewRootCommand()
 	listDirect := mustFindCommand(t, root, "chat", "message", "list-direct")
diff --git a/internal/cli/schema_catalog.json b/internal/cli/schema_catalog.json
index c6fed70d..f805cfe3 100644
--- a/internal/cli/schema_catalog.json
+++ b/internal/cli/schema_catalog.json
@@ -1,6 +1,6 @@
 {
   "version": 1,
-  "source_hash": "sha256:ad2173126ac607dc824408d96906d1d183464e052f2d367158cc067bfbefcf83",
+  "source_hash": "sha256:c3bc35f60d36197aa1df7126513a85b5d4217fd0db3f32ece445d9a1ef76e870",
   "surface_hash": "sha256:631b73b174f48cb0cca7c8449e80920739010d0db223dac2855101f4dbd0eda6",
   "catalog": {
     "agent_metadata": {
@@ -141587,7 +141587,7 @@
           "type": "string"
         },
         "rooms": {
-          "description": "会议室 roomId 列表，逗号分隔 (创建时直接预定，roomId 必须来自 `room search` 返回，若是循环会议，必须设置recurrence-end-date，避免长期预订)",
+          "description": "会议室 roomId 列表，逗号分隔 (创建时直接预定，roomId 必须来自“room search”返回，若是循环会议，必须设置recurrence-end-date，避免长期预订)",
           "field_provenance": {
             "description": {
               "candidates": [
@@ -141595,7 +141595,7 @@
                   "precedence": "cobra_contract",
                   "selected": true,
                   "source": "cobra_usage",
-                  "value": "会议室 roomId 列表，逗号分隔 (创建时直接预定，roomId 必须来自 `room search` 返回，若是循环会议，必须设置recurrence-end-date，避免长期预订)"
+                  "value": "会议室 roomId 列表，逗号分隔 (创建时直接预定，roomId 必须来自“room search”返回，若是循环会议，必须设置recurrence-end-date，避免长期预订)"
                 },
                 {
                   "precedence": "mcp_metadata",
@@ -141613,7 +141613,7 @@
               "precedence": "cobra_contract",
               "resolution": "highest_precedence",
               "source": "cobra_usage",
-              "value": "会议室 roomId 列表，逗号分隔 (创建时直接预定，roomId 必须来自 `room search` 返回，若是循环会议，必须设置recurrence-end-date，避免长期预订)"
+              "value": "会议室 roomId 列表，逗号分隔 (创建时直接预定，roomId 必须来自“room search”返回，若是循环会议，必须设置recurrence-end-date，避免长期预订)"
             },
             "interface_type": {
               "candidates": [
diff --git a/internal/helpers/calendar.go b/internal/helpers/calendar.go
index e9af5ff0..e0b3c975 100644
--- a/internal/helpers/calendar.go
+++ b/internal/helpers/calendar.go
@@ -1173,7 +1173,7 @@ func newCalendarCommand() *cobra.Command {
 	eventCreateCmd.Flags().String("members", "", "")
 	_ = eventCreateCmd.Flags().MarkHidden("members")
 	eventCreateCmd.Flags().String("open-dingtalk-ids", "", "openDingTalkId 列表，逗号分隔 (与 --attendees 至少传一个)")
-	eventCreateCmd.Flags().String("rooms", "", "会议室 roomId 列表，逗号分隔 (创建时直接预定，roomId 必须来自 `room search` 返回，若是循环会议，必须设置recurrence-end-date，避免长期预订)")
+	eventCreateCmd.Flags().String("rooms", "", "会议室 roomId 列表，逗号分隔 (创建时直接预定，roomId 必须来自“room search”返回，若是循环会议，必须设置recurrence-end-date，避免长期预订)")
 	eventCreateCmd.Flags().String("room-ids", "", "")
 	_ = eventCreateCmd.Flags().MarkHidden("room-ids")
 	eventCreateCmd.Flags().String("roomIds", "", "")
diff --git a/internal/helpers/calendar_help_test.go b/internal/helpers/calendar_help_test.go
new file mode 100644
index 00000000..07a1a045
--- /dev/null
+++ b/internal/helpers/calendar_help_test.go
@@ -0,0 +1,39 @@
+// Copyright 2026 Alibaba Group
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package helpers
+
+import (
+	"bytes"
+	"strings"
+	"testing"
+)
+
+func TestCrossPlatformCoverageCalendarEventCreateHelpKeepsRoomsStringMetavar(t *testing.T) {
+	cmd := newCalendarCommand()
+	var out bytes.Buffer
+	cmd.SetOut(&out)
+	cmd.SetErr(&out)
+	cmd.SetArgs([]string{"event", "create", "--help"})
+	if err := cmd.Execute(); err != nil {
+		t.Fatalf("calendar event create --help: %v\n%s", err, out.String())
+	}
+
+	help := out.String()
+	if !strings.Contains(help, "--rooms string") {
+		t.Fatalf("calendar event create help missing string metavar for --rooms:\n%s", help)
+	}
+	if strings.Contains(help, "--rooms room search") {
+		t.Fatalf("calendar event create help treated description text as --rooms metavar:\n%s", help)
+	}
+}