New answers tagged wayfinding
Why don't you try a small "graph" style icon to represent attributes: I feel that this icon can't be confused with something such as "tools" or "options"
Consider creating a prettier version of a scatterplot.
An icon representing generic control elements should work, for example showing a two-part radio button. Or, similar, a simplified equalizer control: If a symbol of "control elements" causes confusion with a tools icon, representing just a list of items could solve that: Images from awoken-icon-theme
I think what you are after, are some way of indicating "more, unspecific information". As @Cakey points out, not everything in the world needs an icon, so maybe some indication of editing might work fine. Luggage tags are usually used for tags as in identifying synonyms on additional information, mainly as a help for search and batch. Such as swiss ...
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