Unclear Where the added tools come from is not stated.
What
Tools are the actions Claude can take, such as reading files or running commands. Claude Code can now append extra tools to that list from an added-tools answer, unless built-in tools are disabled. The step that puts the tool list together also has new options for this.
Why
The set of tools Claude has can now be extended beyond the ones built in.
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Where the added tools come from is not stated.