Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given that there is no output schema, the description must convey what the agent can expect in the response. It does so by naming the categories: settings (languages, subscriptions, access) and services with UUIDs, section by section. This gives a good high-level picture of the return structure. It could be more detailed (e.g., exact format), but it is sufficient for an agent to understand the tool's purpose and outcome.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.