Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the complexity of an upsert operation (including external ID handling, confirmation, target org selection), and the absence of an output schema, annotations, and parameter descriptions, the description is severely incomplete. It provides no information on return values, error handling, matching behavior, or any prerequisites, making it inadequate for reliable tool invocation.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.