It appears that auto_increment is showing up in SHOW CREATE TABLE output:
drizzle> show create table dump_table1;
+-------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Table       | Create Table                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
+-------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| dump_table1 | CREATE TABLE `dump_table1` (
  `col_char_128` VARCHAR(128) COLLATE utf8_general_ci DEFAULT NULL,
  `pk` INT NOT NULL AUTO_INCREMENT,
  `col_int_key` INT DEFAULT NULL,
  `col_char_10` VARCHAR(10) COLLATE utf8_general_ci DEFAULT NULL,
  `col_bigint_not_null` BIGINT NOT NULL,
  `col_char_128_not_null_key` VARCHAR(128) COLLATE utf8_general_ci NOT NULL,
  `col_char_10_not_null_key` VARCHAR(10) COLLATE utf8_general_ci NOT NULL,
  `col_char_128_not_null` VARCHAR(128) COLLATE utf8_general_ci NOT NULL,
  `col_char_128_key` VARCHAR(128) COLLATE utf8_general_ci DEFAULT NULL,
  `col_enum_not_null_key` ENUM('a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z') NOT NULL,
  `col_enum` ENUM('a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z') DEFAULT NULL,
  `col_bigint` BIGINT DEFAULT NULL,
  `col_int` INT DEFAULT NULL,
  PRIMARY KEY (`pk`),
  KEY `col_int_key` (`col_int_key`),
  KEY `col_char_128_not_null_key` (`col_char_128_not_null_key`),
  KEY `col_char_10_not_null_key` (`col_char_10_not_null_key`),
  KEY `col_char_128_key` (`col_char_128_key`),
  KEY `col_enum_not_null_key` (`col_enum_not_null_key`)
) ENGINE=InnoDB COLLATE = utf8_general_ci AUTO_INCREMENT=1 | 
+-------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0 sec)