Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool has no parameters and no output schema, the description covers the what (Salesforce accounts, deals, contacts), where (persistent memory), and when (after significant update). It does not describe the return value or potential errors, but for this simple, no-argument tool the description is largely complete.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.