Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
With one parameter and no output schema, the description compensates by listing the major return fields (title, description, assigned users, deadline, checklists, stickers, time tracking), giving the agent a good sense of what it will receive. It stops short of describing the exact response format or handling of missing tasks, but for a simple getter with strong annotations, this is nearly complete.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.