commented sh files

src/sh/tools.sh

@@ -1,3 +1,13 @@
+# Load the tools required for this application. The tools are preset with
+# default command-line arguments.
+#
+# List of tools:
+# - fzf:   in order to display, search, and navigate lists
+# - curl:  for API access
+# - jq:    to parse json files
+# - mpv:   music player
+# - socat: to communicate with the socket mpv is bound to
+# - xsel:  to copy content to the clipboard (not necessary)
 if [ ! "${TOOLS_LOADED:-}" ]; then
   if command -v "fzf" >/dev/null; then
     FZF="fzf --black --ansi --cycle --tiebreak=chunk,index"