the tool is "Harvest template", and it's not a bot... it is a tool used by a lot of people for a lot of tasks. When it is wrong, it is because the user uses it wrongly, OR there is something wrong in templates on the target wiki...
here, on enwiki, the used template is a REDIRECT, , i. e. : it is exactly as if there was the template "death date and age" on those articles...
Any tool that queries "death date and age" (a perfectly correct and legitimate template), will also have answers from this redirect, with absolutely no means to identify or block them...
AFAIK, this template is used only on shogi players (or at least Japanese persons, see here). It should either not be redirected, or replaced with another template that makes the same computation, but is not a redirect.
Very conscious of the problem, I have not imported ANY death date from enwp since your first notification, thus having to add them manually... thousands of manual additions because of a few dozens articles with a wrong template :(
for technical help about Harvest template and this redirect to target template, please contact @Pasleim : maybe he can do something to help you solve this specific problem... which would be nice for all of us :)