From 6d5331ddddc873e07baaa4704d30f559f925d2d7 Mon Sep 17 00:00:00 2001
From: Terrence <terrence@tenclass.com>
Date: Sat, 24 May 2025 03:06:01 +0800
Subject: [PATCH] [MCP] extend tools/list payload size to 8000

---
 main/idf_component.yml |  2 +-
 main/mcp_server.cc     | 18 +++++++++++++-----
 2 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/main/idf_component.yml b/main/idf_component.yml
index 47820c16..0a18f68f 100644
--- a/main/idf_component.yml
+++ b/main/idf_component.yml
@@ -11,7 +11,7 @@ dependencies:
   78/esp_lcd_nv3023: ~1.0.0
   78/esp-wifi-connect: ~2.4.2
   78/esp-opus-encoder: ~2.3.2
-  78/esp-ml307: ~2.0.2
+  78/esp-ml307: ~2.0.3
   78/xiaozhi-fonts: ~1.3.2
   espressif/led_strip: ^2.5.5
   espressif/esp_codec_dev: ~1.3.2
diff --git a/main/mcp_server.cc b/main/mcp_server.cc
index 0e86ae39..16559250 100644
--- a/main/mcp_server.cc
+++ b/main/mcp_server.cc
@@ -124,8 +124,10 @@ void McpServer::ParseMessage(const cJSON* json) {
     
     if (method_str == "initialize") {
         auto app_desc = esp_app_get_description();
-        ReplyResult(id_int, "{\"protocolVersion\":\"2024-11-05\",\"capabilities\":{\"tools\":{}},"
-            "\"serverInfo\":{\"name\":\"" BOARD_NAME "\",\"version\":\"" + std::string(app_desc->version) + "\"}}");
+        std::string message = "{\"protocolVersion\":\"2024-11-05\",\"capabilities\":{\"tools\":{}},\"serverInfo\":{\"name\":\"" BOARD_NAME "\",\"version\":\"";
+        message += app_desc->version;
+        message += "\"}}";
+        ReplyResult(id_int, message);
     } else if (method_str == "tools/list") {
         std::string cursor_str = "";
         if (params != nullptr) {
@@ -161,18 +163,24 @@ void McpServer::ParseMessage(const cJSON* json) {
 }
 
 void McpServer::ReplyResult(int id, const std::string& result) {
-    std::string payload = "{\"jsonrpc\":\"2.0\",\"id\":" + std::to_string(id) + ",\"result\":" + result + "}";
+    std::string payload = "{\"jsonrpc\":\"2.0\",\"id\":";
+    payload += std::to_string(id) + ",\"result\":";
+    payload += result;
+    payload += "}";
     Application::GetInstance().SendMcpMessage(payload);
 }
 
 void McpServer::ReplyError(int id, const std::string& message) {
     std::string payload = "{\"jsonrpc\":\"2.0\",\"id\":";
-    payload += std::to_string(id) + ",\"error\":{\"message\":\"" + message + "\"}}";
+    payload += std::to_string(id);
+    payload += ",\"error\":{\"message\":\"";
+    payload += message;
+    payload += "\"}}";
     Application::GetInstance().SendMcpMessage(payload);
 }
 
 void McpServer::GetToolsList(int id, const std::string& cursor) {
-    const int max_payload_size = 1400; // ML307 MQTT publish size limit
+    const int max_payload_size = 8000;
     std::string json = "{\"tools\":[";
     
     bool found_cursor = cursor.empty();