Despues de regenerar el descriptor quedo:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE jbosscmp-jdbc PUBLIC "-//JBoss//DTD JBOSSCMP-JDBC 4.0//EN" "http://www.jboss.org/j2ee/dtd/jbosscmp-jdbc_4_0.dtd">
<jbosscmp-jdbc>
<defaults>
<datasource>java:/MySqlDS</datasource>
<datasource-mapping>mySQL</datasource-mapping>
<create-table>false</create-table>
<alter-table>false</alter-table>
<remove-table>false</remove-table>
<read-only>false</read-only>
<row-locking>true</row-locking>
<unknown-pk>
<unknown-pk-class>java.lang.Integer</unknown-pk-class>
<field-name>idCliente</field-name>
<read-only>false</read-only>
<column-name>id_cliente</column-name>
<jdbc-type>INTEGER</jdbc-type>
<sql-type>INTEGER</sql-type>
<auto-increment />
</unknown-pk>
</defaults>
<enterprise-beans>
<entity>
<ejb-name>Cliente</ejb-name>
<datasource>MySqlDS</datasource>
<datasource-mapping>mySQL</datasource-mapping>
<table-name>cliente</table-name>
<cmp-field>
<field-name>graciaCliente</field-name>
<read-only>false</read-only>
<column-name>gracia_cliente</column-name>
<jdbc-type>VARCHAR</jdbc-type>
<sql-type>VARCHAR</sql-type>
</cmp-field>
<cmp-field>
<field-name>dirCliente</field-name>
<read-only>false</read-only>
<column-name>dir_cliente</column-name>
<jdbc-type>VARCHAR</jdbc-type>
<sql-type>VARCHAR</sql-type>
</cmp-field>
<cmp-field>
<field-name>idCliente</field-name>
<read-only>false</read-only>
<column-name>id_cliente</column-name>
<not-null />
<jdbc-type>INTEGER</jdbc-type>
<sql-type>INTEGER</sql-type>
<auto-increment />
</cmp-field>
<unknown-pk>
<unknown-pk-class>java.lang.Integer</unknown-pk-class>
<column-name>id_cliente</column-name>
<jdbc-type>INTEGER</jdbc-type>
<sql-type>INTEGER</sql-type>
</unknown-pk>
<entity-command name="mysql-get-generated-keys" />
</entity>
</enterprise-beans>
</jbosscmp-jdbc>