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 and no output schema, the description is insufficient. It doesn't explain what 'opening' entails (e.g., changing status, reactivating workflows), potential side effects, error conditions, or return values. Given the complexity implied by sibling tools like 'close_case_by_id', more behavioral context is needed.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.