Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a simple read-only search tool with two flat parameters and no output schema, this description is complete. It explains what to send (query, with limit in schema) and what to expect back (ranked page titles, URLs, descriptions, match scores), satisfying the return-format burden imposed by the missing output schema. Nothing needed for correct invocation is missing.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.