Problems with queries
The double quote " is actually specifying a field or an identifier.  Use single quotes to specify your string filters:

SELECT *
FROM information_schema.TABLES
WHERE TABLE_SCHEMA='mysql'
AND TABLE_NAME='servers'
;


Problem #2 could be you are USEing the wrong database.

For example, if your table servers is in the schema mysql and you are currently using INFORMATION_SCHEMA and you try to DESC SERVERS; you will receive an error.  To get around this you can fully qualify your table name (in this example DESC mysql.servers) or USE &lt;schema_name_here&gt; and then issue your DESC SERVERS; command.

Try explicitly spelling it out: DESCRIBE mysql.servers;  Also, make sure that you are using the correct case for your table names.  Servers, SERVERS, and servers are all different in MySQL.