Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description serves as the sole behavioral disclosure. It conveys a read-only operation and the scope ('all institutions linked to monarch money'), but offers no details about output format, pagination, ordering, or other runtime behaviors. Sufficient for a simple zero-param read, but nothing beyond the basic operation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.