Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a simple get-by-id tool with one parameter and strong annotations, the description is adequately complete. It could possibly define 'sprint sticker' more explicitly, but the combination of name, description, and annotations is sufficient for an agent to select and invoke the tool correctly.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.