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Browser agent and web search tools not working #28390

Description

@chits-nema

What happened?

[ACTION REQUIRED] 📎 PLEASE ATTACH THE EXPORTED CHAT HISTORY JSON FILE TO THIS ISSUE IF YOU FEEL COMFORTABLE SHARING IT.

What did you expect to happen?

The agent's web-enabled tools (google_web_search and web_fetch) are consistently failing with an INVALID_MODEL error. This prevents the agent from
performing any tasks that require accessing external web resources, such as web searches or fetching content from URLs.

The expected behavior is that these tools should connect to the internet and return information. Instead, they return a system error pointing to an issue
with the gemini-3-flash-preview model.

Client information

  • CLI Version: 0.50.0
  • Git Commit: 8d9733d
  • Session ID: 6e8ddcff-8cf5-41c4-8372-4124210e4867
  • Operating System: win32 v24.16.0
  • Sandbox Environment: no sandbox
  • Model Version: gemini-2.5-pro
  • Auth Type: gemini-api-key
  • Memory Usage: 329.9 MB
  • Terminal Name: Unknown
  • Terminal Background: #0c0c0c
  • Kitty Keyboard Protocol: Unsupported

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    area/agentIssues related to Core Agent, Tools, Memory, Sub-Agents, Hooks, Agent Qualitykind/bugpriority/p1Important and should be addressed in the near term.status/bot-triaged

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