Which tool would an architect likely leverage while diagnosing issues with an inbound RESTful integration to Salesforce?

An architect would likely use Workbench to diagnose issues with an inbound RESTful integration to Salesforce because Workbench is a powerful web-based tool that allows developers and administrators to interact with Salesforce APIs. It provides capabilities such as executing REST and SOAP API calls, querying data, and inspecting responses in real-time, which are essential for troubleshooting integration issues.

With Workbench, an architect can easily send RESTful requests to Salesforce, view detailed responses, and analyze status codes, which can help identify where the integration may be failing. It also offers functionality to check logs and monitor API usage, making it invaluable for diagnosing inbound integration problems.

In contrast, while Data Loader is a useful tool for bulk data operations, it doesn't specifically cater to the real-time diagnostics needed in RESTful integrations. The Force.com SOAP Explorer is focused on SOAP APIs and is not relevant for RESTful integrations. Finally, the Metadata audit trail is aimed at tracking changes to Salesforce metadata and does not provide insights into API integration issues.