Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a simple price-getting tool with one parameter and no output schema, the description covers the essential aspects: action, input format, limits, and market. It lacks mention of output structure, but that is not required since no output schema exists. It could be improved by noting that it returns current (not historical) prices, but the name implies it.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.