LangChain adds free p0-powered web search to Managed Deep Agents

LangChain announced that web search powered by p0 can be added to Managed Deep Agents for free. The integration requires no separate vendor accounts, managing extra PI keys, or wiring search tools.

A [demo](https://x.com/LangChain/status/2107485278348935673/video/1) from ndrezn demonstrated the configuration and search workflow.