Deployment Solution 7.x supported token list has been a frequently asked question so far. So I thought to consolidate all those and post it as a single point of reference to help all those who are looking for this information.
Following is the list of all tokens which can be used in a task (Like can be used in Apply System Configuration Task, Personality Capture Task, Imaging Task etc with understanding of its feasibility ):
1. %AGENTIPADDR%-The IP address of the NIC of the client computer connected to TS
2. %COMPNAME%-Actual Computer name used by the OS
3. %CUSTOMETOKEN% - Can be created from SQL based on requirement
4. %DATE%-Date string in the form mm/dd/yyyy
5. %DOMAIN%-MS Workgroup or Domain Name
6. %DOMAINOU%-Domain Organization Units
7. %IPNAME%-Full DNS Name of the computer
8. %NAME%-Complete Computer Name as displayed in the console
9. %OS%-Specific Operating System
10. %SERIALNUMBER%- Serial Number from a OEM hardware (May not be there for assembled machines and Not applicable for VM clients)
11. %USER_NAME%-The 'Registered To' user name that can be viewed on the systems properties page of Windows
12. %UUID%-The Universally Unique Identifier of the computer, if supported by hardware.
Another list of tokens are to be used only in unattended files ( Mainly for Scripted OS installation, Imaging):
1. @timezone
2. @userName
3. @domainou
4. @compName
5. @license
6. @tcpIP
7. @adapter
8. @ProcessArchitecture
9. @microsoftWindowsTCPIP
10. @microsoftWindowsDNSClient
11. @microsoftWindowsNetBT
12. @microsoftWindowsUnattendedJoin
13. @identification
14. @NetCardAddress
15. @AutoMode
16. @AutoUsers
Generic/common tokens for Symantec Management Platform are at Symantec Management Console > Settings > All Settings > Notification Server> Task Settings.
An article with hope of being helpful for someone, sometime in case of desperate need. 
Thanks,
Vaibhav Sharma