fix(mcp): expose message queue topics

Closes #5214

crates/dbx-core/src/schema.rs

@@ -1783,6 +1783,20 @@ async fn agent_object_statistics_query(
         .await
 }
 
+#[cfg(feature = "mq-admin")]
+fn message_queue_topic_tables(topics: Vec<crate::mq::TopicInfo>) -> Vec<db::TableInfo> {
+    topics
+        .into_iter()
+        .map(|topic| db::TableInfo {
+            name: topic.name,
+            table_type: "TOPIC".to_string(),
+            comment: None,
+            parent_schema: topic.namespace,
+            parent_name: None,
+        })
+        .collect()
+}
+
 async fn list_tables_once(
     state: &AppState,
     connection_id: &str,
@@ -1799,6 +1813,25 @@ async fn list_tables_once(
         state.get_or_create_metadata_pool_for_session(connection_id, Some(database), client_session_id).await?;
     let db_config = connection_config(state, connection_id).await;
 
+    #[cfg(feature = "mq-admin")]
+    if db_config.as_ref().is_some_and(|config| config.db_type == DatabaseType::MessageQueue) {
+        let topics = crate::mq::service::mq_list_topics_core(
+            state,
+            connection_id,
+            crate::mq::NamespaceRef { tenant: database.to_string(), namespace: schema.to_string() },
+            crate::mq::ListTopicsOpts::default(),
+        )
+        .await?;
+        return Ok(filter_table_infos(
+            message_queue_topic_tables(topics),
+            filter,
+            limit,
+            offset,
+            object_types,
+            table_name_filter,
+        ));
+    }
+
     {
         let connections = state.connections.read().await;
         if let Some(PoolKind::ExternalDriver { config, session, .. }) = connections.get(&pool_key) {
@@ -3167,6 +3200,26 @@ for line in sys.stdin:
         }
     }
 
+    #[cfg(feature = "mq-admin")]
+    #[test]
+    fn message_queue_topics_are_exposed_as_table_metadata() {
+        let tables = super::message_queue_topic_tables(vec![crate::mq::TopicInfo {
+            name: "orders".to_string(),
+            short_name: "orders".to_string(),
+            partitioned: true,
+            partitions: Some(3),
+            persistent: true,
+            internal: false,
+            message_type: None,
+            namespace: Some("default".to_string()),
+        }]);
+
+        assert_eq!(tables.len(), 1);
+        assert_eq!(tables[0].name, "orders");
+        assert_eq!(tables[0].table_type, "TOPIC");
+        assert_eq!(tables[0].parent_schema.as_deref(), Some("default"));
+    }
+
     fn test_object_info(name: &str, object_type: &str) -> super::db::ObjectInfo {
         super::db::ObjectInfo {
             name: name.to_string(),

crates/dbx-mcp/Cargo.toml

@@ -5,8 +5,9 @@ edition = "2021"
 license = "Apache-2.0"
 
 [features]
-default = ["duckdb-sidecar"]
+default = ["duckdb-sidecar", "mq-admin"]
 duckdb-sidecar = ["dbx-core/duckdb-sidecar"]
+mq-admin = ["dbx-core/mq-admin"]
 
 [[bin]]
 name = "dbx-mcp"

crates/dbx-mcp/tests/local.rs

@@ -259,6 +259,12 @@ async fn executes_mongo_shell_commands_without_desktop_process() {
     server_task.abort();
 }
 
+#[test]
+#[cfg(feature = "mq-admin")]
+fn mcp_default_features_include_message_queue_admin() {
+    assert_eq!(dbx_core::mq::MqSystemKind::Kafka.as_str(), "kafka");
+}
+
 async fn call_query(client: &rmcp::service::RunningService<rmcp::RoleClient, ()>, sql: &str) -> String {
     let arguments = json!({
         "connection_id": "mongo-e2e",

packages/mcp-server/README.md

@@ -144,7 +144,7 @@ Ask the MCP client to:
 | `dbx_list_connections` | List connections visible to the MCP session |
 | `dbx_add_connection` | Add a connection to DBX storage |
 | `dbx_remove_connection` | Remove a connection from DBX storage |
-| `dbx_list_tables` | List tables, views, or collections |
+| `dbx_list_tables` | List tables, views, collections, or message queue topics |
 | `dbx_describe_table` | Return columns and table metadata |
 | `dbx_get_schema_context` | Return compact schema context suitable for an AI model |
 | `dbx_execute_query` | Execute SQL or a supported MongoDB shell command, returning at most 100 rows |
@@ -455,7 +455,7 @@ MCP 配置：
 | `dbx_list_connections` | 列出当前 MCP 会话可见的连接 |
 | `dbx_add_connection` | 添加 DBX 连接配置 |
 | `dbx_remove_connection` | 删除 DBX 连接配置 |
-| `dbx_list_tables` | 列出表、视图或集合 |
+| `dbx_list_tables` | 列出表、视图、集合或消息队列 Topic |
 | `dbx_describe_table` | 获取字段和表结构 |
 | `dbx_get_schema_context` | 获取适合 AI 使用的紧凑 Schema 上下文 |
 | `dbx_execute_query` | 执行 SQL 或支持的 MongoDB Shell 命令，最多返回 100 行 |