Call MCP error argument 'content' is null

[checkHup]

Bug description
Call MCP error argument 'content' is null

Environment
1.0.0-M8

Steps to reproduce

java.lang.IllegalArgumentException: argument "content" is null
at com.fasterxml.jackson.databind.ObjectMapper._assertNotNull(ObjectMapper.java:5086) ~[jackson-databind-2.18.3.jar:2.18.3]
at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3850) ~[jackson-databind-2.18.3.jar:2.18.3]
at org.springframework.ai.model.ModelOptionsUtils.jsonToMap(ModelOptionsUtils.java:91) ~[spring-ai-model-1.0.0-M8.jar:1.0.0-M8]
at org.springframework.ai.mcp.AsyncMcpToolCallback.call(AsyncMcpToolCallback.java:108) ~[spring-ai-mcp-1.0.0-M8.jar:1.0.0-M8]
at org.springframework.ai.mcp.AsyncMcpToolCallback.call(AsyncMcpToolCallback.java:122) ~[spring-ai-mcp-1.0.0-M8.jar:1.0.0-M8]
at org.springframework.ai.model.tool.DefaultToolCallingManager.executeToolCall(DefaultToolCallingManager.java:205) ~[spring-ai-model-1.0.0-M8.jar:1.0.0-M8]
at org.springframework.ai.model.tool.DefaultToolCallingManager.executeToolCalls(DefaultToolCallingManager.java:128) ~[spring-ai-model-1.0.0-M8.jar:1.0.0-M8]
at org.springframework.ai.openai.OpenAiChatModel.lambda$internalStream$10(OpenAiChatModel.java:365) ~[spring-ai-openai-1.0.0-M8.jar:1.0.0-M8]

Expected behavior
I hope to return in the form of sse

Minimal Complete Reproducible example
client:
public Flux<ServerSentEvent> simpleChat(@RequestParam(value = "query", defaultValue = "hello")String query) {

    return dashScopeChatClient
            .prompt(query)
            .stream()
            .chatResponse()
            .map(data->{
                    String text=data.getResult().getOutput().getText();
                    return ServerSentEvent.builder()
                            .data(text)
                            .build();
            });
}

spring:
ai:
mcp:
client:
type: ASYNC
sse:
connections:
server1:
url: http://localhost:8081

server:
@tool(description = "serach all tables")
public String queryAllTables(){
String sql = "SELECT TABLE_NAME , TABLE_COMMENT FROM information_schema.tables WHERE TABLE_SCHEMA = DATABASE()";
return sql;
}

spring:
ai:
mcp:
server:
name: webflux-mcp-server
version: 1.0.0
stdio: false
type: ASYNC # Recommended for reactive applications

[wenyuanLv]

May I ask how you solved it？I encountered the same problem

[wenyuanLv]

@checkHup 大佬，你解决了吗，这个问题

[checkHup]

@checkHup 大佬，你解决了吗，这个问题

我记得是我更换为本地模型就好了

[huidongyin]

我提了个PR去解决这个，但是还没merge：#4027