migration

 
 * **System prompt and model:** Same fields, now on the agent definition.
 * **Custom tools:** Still declared with JSON Schema. Execution moves from inline handling to responding to `agent.custom_tool_use` events. See [Session event stream](https://platform.claude.com/docs/en/managed-agents/events-and-streaming).
+* **Web search and web fetch settings:** Same `allowed_domains`, `blocked_domains`, `max_content_tokens`, and `user_location` fields, now set once on the `web_search` and `web_fetch` entries of the agent toolset's `configs` array instead of on every request. The `max_uses`, `citations`, and `cache_control` fields are not available. See [Restrict web search and web fetch domains](https://platform.claude.com/docs/en/managed-agents/tools#restrict-web-search-and-web-fetch-domains).
 * **Context:** You can still inject context through the system prompt, [file resources](https://platform.claude.com/docs/en/managed-agents/files), or [skills](https://platform.claude.com/docs/en/managed-agents/skills).
 
 ## From the Claude Agent SDK