Does the description explain when to use this tool, when not to, or what alternatives exist?
The parenthetical "(ID from list_shares)" implies the workflow of listing shares first, which is useful context. However, there is no explicit when-to-use/when-not guidance, no statement about when to prefer `update_share` (e.g., to revoke access without deleting the link), and no prerequisites mentioned.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.