Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the simplicity (no parameters, no output schema), the description is mostly complete. However, it does not mention what the list contains (e.g., transition names, categories, whether they are available for both video and audio tracks), and it doesn't hint at how the list might be used with other tools. For a simple listing tool, this is acceptable but could slightly improve by mentioning typical usage.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.