Start with the fit between the broker's work and your assignment. Ask for relevant property examples, the broker's role in those transactions and an explanation of how that experience applies to your building or requirement. Shopping center leasing, selling an occupied asset and finding a business location involve different tasks, even when the same broker can support more than one service.
Ask how the assignment would begin, what information is needed, how the property or requirement would be presented and how progress would be communicated. A useful conversation should cover likely questions, responsibilities and decisions as well as marketing. Aaron's public transaction examples identify the CBM1 team members named in the source announcement, and an initial consultation can establish the appropriate scope for your own assignment.