In Oracle Support and in PeopleBooks, the Search Framework call back user is said to require the PeopleSoft Administrator role. Given the power that role gives to a user, this breaks many security policies. Thankfully, this role isn’t required for the call back user. Instead follow these guidelines for security with the call back user:

• Set PTPT3100 as the Primary, Process Profile, and Row Security Permission List
• Assign the following roles:
  • PeopleSoft User
  • Search Administrator
  • Search Developer
  • Search Query Administrator
  • Search Server
  • Search-xxx

For your application, the Search-xxx Role will give access to the Search Catetories you want to deploy. These roles will change depending on your application and configuration.