MCF stands for "Managed Connection Factories". When configuring a Database Adapter using Adapter Configuration Wizard, a Database Connection is required to configure the adapter. This connection you create inside connection Navigator->Database.
Once the adapter is created, a WSDL file is automatically created that includes the adapter definition. This includes the Managed Connection Factory (MCF) properties as well as the Java Naming and Directory Interface (JNDI) name (which you create on Enterprise Manager side), as shown below:
<port name="UpdateEmpTable_pt" binding="tns:UpdateEmpTable_binding">
<jca:address location="eis/DB/MyDBHR" UIConnectionName="MyDB" ManagedConnectionFactory="oracle.tip.adapter.db.DBManagedConnectionFactory" mcf.DriverClassName="oracle.jdbc.OracleDriver" mcf.PlatformClassName="oracle.toplink.platform.database.oracle.Oracle10Platform" mcf.ConnectionString="jdbc:oracle:thin:@//126.96.36.199:1521/orcl" mcf.UserName="hr" mcf.Password="8498F4AC99532042CRECC296529B23E6" />
If you are using JNDI then manually remove MCF properties from your code once development is complete.