TypeError: UrlElicitationRequiredError.__init__() takes from 2 to 3 positional arguments but 4 were given

这个报错通常出现在把 MCP 异常对象做 pickle / cloudpickle 序列化跨进程或跨任务传递时,反序列化会按 Exception.args 调用构造函数,而 UrlElicitationRequiredError.__init__ 期望的位置参数类型与 args 不匹配。优先排查你使


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