Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavior disclosure, but all it adds is that the tool returns historical move data. It does not state what a move/migration contains, whether the result is a list or single record, whether there are limits or ordering, or what side effects (if any) exist. The read-only nature is only implied by 'Get'.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.