DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.
The NotebookEdit tool now properly resolves relative paths (consistent with other file tools) and uses randomUUID instead of Math.random() for generating cell IDs.
Evidence
Path resolution in notebook edit (search for "notebook_path" and backfillObservableInput in the diff)
Strings lifted out of the shipped bundle, so the claim above can be checked against them.