Currently, the ⟨description⟩ in key documentation:

\begin{docKey}[⟨key path⟩][⟨options⟩]{⟨name⟩}{⟨parameters⟩}{⟨description⟩}
⟨key description⟩
\end{docKey}

is free text. But most of the time, for instance in tcolorbox documentation (almost 700 out of 900 cases), this ⟨description⟩ is something like:

• “no default, initially unset”,
• or “no default, initially [...]”,
• or “default [...], initially unset”,
• or “default [...], initially [...]”.

So maybe there is also here a room for improving the semantic of the ⟨description⟩...