Merge pull request #3259 from emqx/improve-tag-rate-limit-desc

fix: more description for tag modifing behavior for clients

Author: Meggielqk

en_US/modules/client_tag.md

@@ -67,9 +67,11 @@ EMQX provides fine-grained rate-limiting strategies per tag, allowing you to con
 | Subscribe Traffic Limit (bytes/s) | Bytes/sec    | Limits the message traffic a client can deliver per second.                          |
 | Maximum QoS Level                 | 0, 1, 2      | Limits the maximum QoS level that clients can use when publishing or subscribing to messages. |
 
-::: tip
+::: tip Note
+
+Except for the QoS level limit, if a restriction item is left empty or set to `0`, it means no restriction is applied to that item.
 
-If a limit value is empty or set to `0`, that limit is **not applied**.
+For the **Maximum QoS Level**, setting the value to `0` does **not** mean “no restriction.” Instead, it limits the maximum QoS level for publishing and subscribing to QoS 0.
 
 :::
 
@@ -107,8 +109,12 @@ Under the **Client Tags** tab, all created tags are displayed in a list, includi
 
 - **View**: See tag names and the number of currently associated clients.
 - **Create**: Click **Add** to add new tags and configure rate-limiting policies. For detailed configuration descriptions, see [Configurable Limits](#configurable-limits).
-- **Manage**: Edit rate-limiting strategies or view the client list under a tag by clicking the **View Client List** button.
-- **Delete**: Delete a tag that is no longer needed. 
+- **Manage**: Edit the rate-limiting policies of an existing tag, or click **View Client List** to check all clients associated with that tag .
+  
+  Once the rate limiting policy is modified, all clients under this tag will automatically update and apply the new configuration at the next rate limiting check.
+- **Delete**: Delete a tag that is no longer needed.
+  
+  After deletion, all clients previously associated with this tag will be reassigned to the `default` tag and immediately apply the rate limiting policy of the `default` tag.
 
 ### Client Search
 

zh_CN/modules/client_tag.md

@@ -66,7 +66,11 @@ EMQX 为每个标签提供精细化的速率限制策略，您可以针对性地
 | 最大 QoS 等级          | `0, 1, 2`   | 限制客户端发布订阅消息的最高 QoS 等级。          |
 
 ::: tip 提示
-如果某个限制项的值为空或为 0，则代表不对此项进行任何限制。
+
+除 QoS 等级限制外，如果某个限制项的值为空或为 `0`，表示不对该项进行任何限制。
+
+对于**最大 QoS 等级**，当其值为 `0` 时，并不代表不进行限制，而是将客户端发布和订阅消息的最高 QoS 等级限制为 0（即 QoS 0）。
+
 :::
 
 ### 触发机制
@@ -104,8 +108,8 @@ EMQX 为每个标签提供精细化的速率限制策略，您可以针对性地
 
 - **查看**：每个标签的名称、当前关联的客户端数量。
 - **创建**：点击**添加**按钮，可以添加新的标签并为其配置限流策略。具体的限制项配置说明，参考[可配置的限制项](#可配置的限制项)。
-- **管理**：对已有标签进行**编辑**（修改限流策略）或通过点击标签列表中的**查看客户端列表**按钮查看其下的客户端列表。
-- **删除**：删除一个不需要的标签。
+- **管理**：对已有标签进行**编辑**（修改限流策略）或通过点击标签列表中的**查看客户端列表**按钮查看其下的客户端列表。修改后，该标签下的所有客户端将在下一次进行限流检查时立即更新其限流配置。
+- **删除**：删除一个不需要的标签。删除某个标签后，该标签下原有的所有客户端将更新自身标签为 `default`，并立即应用 `default` 标签的限流配置。
 
 ### 客户端搜索