What
A tool call is a request from Claude to use one of Claude Code's tools. For tools in the Artifact family, when a call fails because it uses an option or value that was offered earlier in the conversation but does not exist in the current session, the error now adds a note. The note says the option was offered earlier but is not available in this session, and to continue without it. Claude Code also records a usage event when this happens.
Why
This helps a resumed conversation recover when the options of these tools have changed since it started, instead of Claude retrying something that will keep failing.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
It is unclear whether the Artifact family of tools is itself switched on for everyone.