Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already carry the safety profile (readOnlyHint=true, destructiveHint=false, openWorldHint=false), so the bar for additional disclosure is lower. The description adds tenant-isolation scope and a clarifying definition of the endpoint resource, but discloses no deeper behavior such as whether unpublished endpoints are included, default pagination behavior, or ordering. This is adequate but not rich behavioral context, so a 3 is appropriate.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.