Unclear What functionality depends on this declared/undeclared signal is not shown by the evidence.
What
Claude Code now tracks, per connected host, whether that host has 'declared' its tools, using a new reactive flag with helpers to mark a host as declared, mark it as undeclared, and subscribe to changes in that state. This is wired in so that clearing a session marks the host as undeclared again.
Why
This is internal plumbing for tracking tool-declaration state per host; the finding does not describe a user-facing effect.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
What functionality depends on this declared/undeclared signal is not shown by the evidence.