Use case
A standalone bike pump is usually tagged as
service:bicycle:pump=yes service:bicycle:tools=no
the latter being assumed to be yes by default. However this currently seems impossible to tag in the app, as the pump can be added, and using the AddBicyclePump the pump tag can be set, the tools tag can not be set to no, thus incorrectly implying that this pump also provides tools.

Proposed Solution

• Add a Bike pump as an addable "thing"
• Add an "only" option to AddBicyclePump when asking about pumps that sets service:bicycle:tools=no