Anthropic Python SDK v1.5.0

Anthropic Python SDK v1.5.0 includes several feature additions and bug fixes across API bindings, credentials handling, and streaming. Highlights include: 1) Managed Agents updates: auto mode tool permissions and support for mounting public GitHub repositories without authorization tokens. 2) Tool handling: messages.create, parse, stream, and count tokens now accept tool objects directly. 3) Beta & API updates: added user-profiles-2026-09-04 beta value, external user details to user profiles, a content-too-large web fetch tool error code, and Message.to param() / BetaMessage.to param(). 4) Credentials & Security: introduces CredentialsError and IdentityTokenFileError, and now rejects credential files accessible by group or others. 5) Bug fixes: resolves extra body merging before client hooks run, prevents partial tool input JSON from staying on content blocks during streaming, and leaves parsed output out of dumped text blocks.

• Ensure file permissions on credentials files restrict access from group and others to prevent rejection by the SDK.
• Optionally simplify tool definitions by passing tool objects directly to messages.create, parse, stream, and count tokens.
• Review Managed Agents sessions to leverage auto mode tool permissions or token-free public GitHub repository mounts if applicable.