MySQL show columns query to string

Question

I am looking for a way to convert the result of a query to a string. The query can be

DESC entries;

or

SHOW COLUMNS FROM entires;

For example, both yield the same result if I execute them in the CLI which is:

+---------+-------------+------+-----+---------+----------------+
| Field   | Type        | Null | Key | Default | Extra          |
+---------+-------------+------+-----+---------+----------------+
| id      | int(11)     | NO   | PRI | NULL    | auto_increment |
| name    | varchar(45) | YES  |     | NULL    |                |
| content | text        | YES  |     | NULL    |                |
| time    | int(11)     | YES  |     | NULL    |                |
+---------+-------------+------+-----+---------+----------------+

However, I need this table as one string. It is NOT an option for me to get his information out of the information_schema.columns table because this information is not present there. It is further necessary to achieve this on the same query. Using PHP or another language is also not an option.

I have tried various things but none of them have been successful so far. These queries all resulted in an error:

SELECT group_concat(Field) FROM (SHOW COLUMNS FROM entries);
SELECT group_concat(SHOW COLUMNS FROM entries);
SELECT group_concat(SHOW COLUMNS FROM entries LIMIT 1);
SELECT Field from (SHOW COLUMNS FROM entries);
SELECT 1 from (SHOW COLUMNS FROM entries);
SELECT group_concat(SHOW COLUMNS FROM entries);
SELECT group_concat(SHOW COLUMNS) FROM entries;

I have tried the same with desc entries; but with the same result.

I always get an error like this:

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
    corresponds to your MySQL server version for the right syntax to use near 'show columns
    from entries)' at line 1

Neither Google nor the manual could tell me how to achieve this, maybe I was looking for the wrong phrases. Any help is highly appreciated.