To prevent inter-tenant communication while reusing the same contract, the contract should be created in the user tenant with the scope set to VRF and then exported to other tenants. This approach allows the contract to be shared across tenants while maintaining the isolation of each tenant's VRF. By setting the scope to VRF, the contract's policies apply only within the context of the specified VRF, thus preventing communication between tenants5678.
References := Implementing Cisco Application Centric Infrastructure Official Cert Guide