Task: Translation / Format
User instruction:
Translate the following API manifest from English to Korean. Note that not all English texts should be translated—only the descriptions or messages should be translated.

{  
  "api_name": "Book Information API",  
  "version": "1.0",  
  "description": "This API provides information about books. It allows querying book titles, authors, publishers, publication dates, and summaries.",  
  "endpoints": [  
    {  
      "method": "GET",  
      "path": "/books/{isbn}",  
      "description": "Retrieves detailed information about a book with a specific ISBN.",  
      "parameters": [  
        {  
          "name": "isbn",  
          "type": "string",  
          "required": true,  
          "description": "The ISBN number of the book to retrieve"  
        }  
      ],  
      "responses": [  
        {  
          "status_code": 200,  
          "description": "Successfully found the book.",  
          "body": {  
            "title": "string",  
            "author": "string",  
            "publisher": "string",  
            "publication_date": "string",  
            "summary": "string"  
          }  
        },  
        {  
          "status_code": 404,  
          "description": "Book not found."  
        }  
      ]  
    },  
    {  
      "method": "GET",  
      "path": "/books/search",  
      "description": "Searches for books by title or author.",  
      "parameters": [  
        {  
          "name": "query",  
          "type": "string",  
          "required": true,  
          "description": "Search term (title or author)"  
        }  
      ],  
      "responses": [  
        {  
          "status_code": 200,  
          "description": "Successfully returned search results.",  
          "body": [  
            {  
              "isbn": "string",  
              "title": "string",  
              "author": "string"  
            }  
          ]  
        },  
        {  
          "status_code": 400,  
          "description": "Invalid request."  
        }  
      ]  
    }  
  ],  
  "errors": [  
    {  
      "error_code": 500,  
      "message": "Server error"  
    },  
    {  
      "error_code": 503,  
      "message": "Service unavailable"  
    }  
  ]  
}

Evaluation criteria:
The API manifest must be output in JSON format; within that JSON, the translated text must be in Korean.
Only the parts corresponding to descriptions or messages should be translated.
Any text that is not to be translated must remain exactly as it is, preserving both format and content.