LangChain 和 LangGraph 的关系：LangChain 智能体构建在 LangGraph 之上，以提供持久化执行、流式处理、人在回路、持久化存储等功能

Tool 声明

{
   "name": "bash",
   "description": "Run commands in a bash shell\n
* When invoking this tool, the contents of the \"command\" parameter does NOT need to be XML-escaped.\n
* You don't have access to the internet via this tool.\n
* You do have access to a mirror of common linux and python packages via apt and pip.\n
* State is persistent across command calls and discussions with the user.\n
* To inspect a particular line range of a file, e.g. lines 10-25, try 'sed -n 10,25p /path/to/the/file'.\n
* Please avoid commands that may produce a very large amount of output.\n
* Please run long lived commands in the background, e.g. 'sleep 10 &' or start a server in the background.",
   "input_schema": {
       "type": "object",
       "properties": {
           "command": {
               "type": "string",
               "description": "The bash command to run."
           }
       },
       "required": ["command"]
   }
}