Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
readOnlyHint=true already signals a safe read, and the description adds useful default behavior (own handle, latest version). It does not disclose failure modes, permission requirements, or return format specifics, though the output schema covers the latter. The added context is moderate but not extensive.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.