Overview:
When attempting to trigger MCP calls within the Google Antigravity editor, the editor never shows the prompt to approve the tool execution. Because of this, I cannot grant authorization, and the request gets stuck in an infinite loading state. The request never completes nor fails with a visible error.
Steps to reproduce:
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Open the Google Antigravity editor.
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Enter a prompt that requires the use of an MCP server (e.g., “Help me test Firebase MCP, get the project list”).
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The AI attempts to trigger the MCP tool (e.g.,
firebase-mcp-server / firebase_get_environment). -
Observe that the editor never shows the prompt to approve the MCP call.
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Notice that, while waiting for a confirmation that cannot be given, the interface gets stuck in an infinite loading loop.
Expected Behavior: Before executing the MCP tool, the editor should show a window or prompt explicitly asking the user to approve or deny the tool call. Once approved by the user, the MCP tool should execute correctly.
Actual Behavior: The editor never shows the prompt to approve the call. Consequently, the process hangs indefinitely. It does not progress beyond this state, requiring the action to be canceled manually.
It is very frustrating, is anyone else having this problem? Is there any workaround for this error? I hope someone can help me.