I asked it and it says that it used a tool called “fetch_pull_request” that is no longer available, and its different from the web_search tool you are talking about.
these are the available tools to the agent right now, “according to him”:
My Available Tools:
codebase_search - Semantic search to find code by meaning
2run_terminal_cmd - Execute terminal commands on your system
grep - Powerful text search using ripgrep
delete_file - Delete files from the filesystem
web_search - Search the web for real-time information