Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's simplicity (1 parameter, no output schema, no nested objects, no enums), the description covers the essential functional behavior. It doesn't describe the return value format, but with no output schema present, a brief note on what fields are returned would be helpful. However, for a read-only profile tool with clear input requirements, the current description is minimally complete.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.