How do you test individual MCP tools with the Inspector?

Once you are connected in the Inspector, you navigate to the Tools section and click List Tools to see every tool your server exposes. When you select a tool, the right panel shows its details and input fields based on the schema generated from your function. To test a document reading tool, for example, you would select the read document contents tool, type in a document identifier such as deposition dot markdown, and click Run Tool. The Inspector then shows both the success status and the actual returned data. This makes it easy to verify your tool works correctly with realistic inputs before any real client ever calls it.