Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a mutation tool with no annotations, 0% schema description coverage, no output schema, and 2 parameters (including a complex nested object), the description is inadequate. It doesn't explain what 'validated' means, doesn't mention the sibling tools for context, and provides no information about return values or error conditions.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.