What
Before Claude Code runs a tool (an action such as editing a file or running a command), a classifier, an automatic check, can judge whether the action is safe to allow. Some of those judgments come from the server. If the tool's input has been rewritten, Claude Code now skips the server's judgment entirely and records the reason as server_input_rewritten.
Why
A judgment made about the original input does not apply to a changed one, so this stops an old verdict from approving an action it never saw.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
It is not clear what rewrites a tool's input.