Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's simplicity (no parameters, no output schema, read-only), the description covers the main behavioral outcomes for both connected and unconnected states. It is sufficiently complete for an agent to understand what to expect, though it could optionally mention error cases or how to use the returned URLs, but these are minor omissions.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.