Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides clear context for when to use the tool: it returns connection status, and the conditional behavior ('When all providers are connected...' / 'When credentials are missing...') informs the agent of the expected outcomes. However, it does not explicitly mention alternatives or exclusions, so it stops short of a 5.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.