Optimistic ToolSearch is now properly disabled when ANTHROPIC_BASE_URL points to a non-first-party Anthropic host, preventing unnecessary tool search requests that would fail.
Evidence
Host check (search for "[ToolSearch:optimistic] disabled: ANTHROPIC_BASE_URL=")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
How sure we are
One source agreesOne thing we can check says the same as this entry.
Anthropic's release notes agreeFixed API 400 errors when using ANTHROPIC_BASE_URL with a third-party gateway — tool search now correctly detects proxy endpoints and…
