[router] add mcp list and mcp call in output array (#11112)

sgl-router/src/protocols/spec.rs

@@ -797,6 +797,17 @@ pub enum ResponseReasoningContent {
     ReasoningText { text: String },
 }
 
+/// MCP Tool information for the mcp_list_tools output item
+#[derive(Debug, Clone, Deserialize, Serialize)]
+pub struct McpToolInfo {
+    pub name: String,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub description: Option<String>,
+    pub input_schema: Value,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub annotations: Option<Value>,
+}
+
 #[derive(Debug, Clone, Deserialize, Serialize)]
 #[serde(tag = "type")]
 #[serde(rename_all = "snake_case")]
@@ -826,6 +837,25 @@ pub enum ResponseOutputItem {
         output: Option<String>,
         status: String,
     },
+    #[serde(rename = "mcp_list_tools")]
+    McpListTools {
+        id: String,
+        server_label: String,
+        tools: Vec<McpToolInfo>,
+    },
+    #[serde(rename = "mcp_call")]
+    McpCall {
+        id: String,
+        status: String,
+        #[serde(skip_serializing_if = "Option::is_none")]
+        approval_request_id: Option<String>,
+        arguments: String,
+        #[serde(skip_serializing_if = "Option::is_none")]
+        error: Option<String>,
+        name: String,
+        output: String,
+        server_label: String,
+    },
 }
 
 #[derive(Debug, Clone, Deserialize, Serialize)]