# edgeworth box can't draw node

I would like to draw in a caption on the top, bottom, left and right of this graph. Unfortunately I can't seem to draw anything at all:

MWE:

\begin{document}

\begin{tikzpicture}
\begin{axis}[axis x line=bottom,
axis y line=left,
domain=0:1,
axis on top,xmin=0]

pattern color=red!30!white,
draw=red!30!white]
{x^e} \closedcycle;
\node[anchor=north west] at (-.5,-1.5) {$\iota$};
\end{axis}
\begin{axis}[
axis x line=top,
axis y line=right,
domain=0:1,
x dir = reverse,
y dir = reverse,
axis on top,xmin=0]
pattern color=blue!30!white,
draw=blue!30!white]
{x^e} \closedcycle;
\end{axis}
\end{tikzpicture}

\end{document}


I may be misinterpreting the question but this adds something left, right and so on of the axis.

\documentclass[tikz,border=3.14mm]{standalone}
\usepackage{pgfplots}
\pgfplotsset{compat=1.16}
\usetikzlibrary{patterns,positioning}
\begin{document}
\begin{tikzpicture}
\begin{axis}[axis x line=bottom,
axis y line=left,
domain=0:1,
axis on top,xmin=0]

pattern color=red!30!white,
draw=red!30!white]
{x^e} \closedcycle;
\node[anchor=north west] at (-.5,-1.5) {$\iota$};
\end{axis}
\begin{axis}[
axis x line=top,
axis y line=right,
domain=0:1,
x dir = reverse,
y dir = reverse,
axis on top,xmin=0]