What
A new component supplies tools that live on other machines. Such a tool can be listed as pending until its machine announces itself. Tools from machines that have since gone away are removed, and each tool is linked to the machine it comes from.
Why
Tools from another machine can appear before that machine has fully connected, and they disappear once the machine is gone instead of lingering.
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The writer flagged doubt
The finding does not say which feature uses this component or how a user reaches it.