Subagent failed to use mcp tools after updating to 0.33.0

[KichangKim]

What happened?

After updating to 0.33.0, subagent cannot use mcp tools.
In my subagent md file, I added mcp tools like this:
(playwright is mcp server name, I used [MCP SERVERNAME]__[TOOLENAME] template)

tools:
  - read_file
  - google_web_search
  - playwright__browser_click
  - playwright__browser_close
  - playwright__browser_console_messages
  - playwright__browser_drag
  - playwright__browser_evaluate
  and other tools ...

It works on 0.32.0. So I think that some changes of 0.33.0 break subagent mcp tool calling.

What did you expect to happen?

Subagent should be able to use tools from mcp server.

Client information

Client Information

Run gemini to enter the interactive CLI, then run the /about command.

> /about
│ About Gemini CLI                                                                                   │
│                                                                                                    │
│ CLI Version                       0.33.0                                                           │
│ Git Commit                        6ee19e1f6                                                        │
│ Model                             Auto (Gemini 3)                                                  │
│ Sandbox                           no sandbox                                                       │
│ OS                                win32                                                            │
│ Tier                              Gemini Code Assist in Google One AI Pro

Login information

Google Account

Anything else we need to know?

No response

[gemini-cli]

Found possible duplicate issues:

• Subagents cannot call MCP tools #17005

If you believe this is not a duplicate, please remove the status/possible-duplicate label.

[gahoo]

I have the same issue after updating to to 0.33.0. I think this is not a duplicate.

[SandyTao520]

fixed by #22069, we'll patch this soon.

[KichangKim]

@SandyTao520
It seems that 0.33.1 still have this issue. 0.33.1 shows new error when using [SERVER_NAME]__[TOOL NAME]. So I changed tool name to mcp_[TOOL NAME] on agent's MD file. But it still fails to call tool.

Subagent shows error like this:

Unauthorized tool call: 'mcp_browser_navigate' is not available to this agent

But mcp_browser_navigate is allowd on MD file of agent.

Additional Notes:
Finally, mcp tool for subagent works. Latest updates of document shows correct tool naming.

*: Grant access to all available built-in and discovered tools.
mcp_*: Grant access to all tools from all connected MCP servers.
mcp_my-server_*: Grant access to all tools from a specific MCP server named my-server.