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Is there any way to overwrite a variable from WT:EDIT that makes do that? I really think that automatic edit summaries should not contain mistakes/misleading info.

By one way of looking at it, the additional tools I made are components of WT:EDIT (or modules added to it, or whatever), like the translation adder and gloss editor cirwin made, in which case it would make sense to have the summaries link to WT:EDIT, which could hold the documentation and discussion all of the editor's modules.