diff --git a/sandbox-core/src/main/java/io/agentscope/runtime/sandbox/manager/SandboxService.java b/sandbox-core/src/main/java/io/agentscope/runtime/sandbox/manager/SandboxService.java
index 7ef3dec..bf49426 100644
--- a/sandbox-core/src/main/java/io/agentscope/runtime/sandbox/manager/SandboxService.java
+++ b/sandbox-core/src/main/java/io/agentscope/runtime/sandbox/manager/SandboxService.java
@@ -150,7 +150,7 @@ public ContainerModel createContainer(Sandbox sandbox) throws JsonProcessingExce
         if (this.remoteHttpClient != null) {
             logger.info("Creating container in remote mode via RemoteHttpClient");
             ObjectMapper mapper = new ObjectMapper();
-            String sandboxJson = mapper.writeValueAsString(sandbox);
+            String sandboxJson = mapper.writeValueAsString(Map.of("sandboxId", sandbox.getSandboxId()));
             Map<String, Object> request = Map.of("sandbox", sandboxJson);
             Object result = remoteHttpClient.makeRequest(
                     RequestMethod.POST,
@@ -536,7 +536,7 @@ public ContainerModel getInfo(Sandbox sandbox) throws JsonProcessingException {
         if (this.remoteHttpClient != null) {
             logger.info("Getting sandbox info in remote mode via RemoteHttpClient");
             ObjectMapper mapper = new ObjectMapper();
-            String sandboxJson = mapper.writeValueAsString(sandbox);
+            String sandboxJson = mapper.writeValueAsString(Map.of("sandboxId", sandbox.getSandboxId()));
             Map<String, Object> request = Map.of("sandbox", sandboxJson);
             Object result = remoteHttpClient.makeRequest(
                     RequestMethod.POST,
@@ -599,7 +599,7 @@ public Map<String, Object> listTools(Sandbox sandbox, String toolType) throws Js
         if (this.remoteHttpClient != null) {
             logger.info("Listing tools in remote mode via RemoteHttpClient");
             ObjectMapper mapper = new ObjectMapper();
-            String sandboxJson = mapper.writeValueAsString(sandbox);
+            String sandboxJson = mapper.writeValueAsString(Map.of("sandboxId", sandbox.getSandboxId()));
             Map<String, Object> request = Map.of(
                     "sandbox", sandboxJson,
                     "toolType", toolType
@@ -630,7 +630,7 @@ public String callTool(Sandbox sandbox, String toolName, Map<String, Object> arg
         if (this.remoteHttpClient != null) {
             logger.info("Calling tool in remote mode via RemoteHttpClient");
             ObjectMapper mapper = new ObjectMapper();
-            String sandboxJson = mapper.writeValueAsString(sandbox);
+            String sandboxJson = mapper.writeValueAsString(Map.of("sandboxId", sandbox.getSandboxId()));
             Map<String, Object> request = Map.of(
                     "sandbox", sandboxJson,
                     "toolName", toolName,
@@ -660,7 +660,7 @@ public Map<String, Object> addMcpServers(Sandbox sandbox, Map<String, Object> se
         if (this.remoteHttpClient != null) {
             logger.info("Adding MCP servers in remote mode via RemoteHttpClient");
             ObjectMapper mapper = new ObjectMapper();
-            String sandboxJson = mapper.writeValueAsString(sandbox);
+            String sandboxJson = mapper.writeValueAsString(Map.of("sandboxId", sandbox.getSandboxId()));
             Map<String, Object> request = Map.of(
                     "sandbox", sandboxJson,
                     "serverConfigs", serverConfigs,