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feat: Add a tool confirmation flow which gathers custom input from the user before tool execution #2687

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feat: Add a tool confirmation flow which gathers custom input from the user before tool execution #2687

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feat: Add a tool confirmation flow which gathers custom input from the user before tool execution

The flow is similar to current OAuth flow:

  • User need to define a custom before_tool_call_back that request a custom input config. They are also responsible for check and validate the provided input before proceed with tool call.
  • ADK will create corresponding RequestInput FunctionCall Event to ask user for input
  • User provide the expected input to a RequestInput FunctionResponse Event.
  • ADK will check the response and use user's own callback validation to continue the tool call.

@DeanChensj @copybara-github
feat: Add a tool confirmation flow which gathers custom input from th…
aed2929 
…e user before tool execution

The flow is similar to current OAuth flow:
- User need to define a custom before_tool_call_back that request a custom input config. They are also responsible for check and validate the provided input before proceed with tool call.
- ADK will create corresponding RequestInput FunctionCall Event to ask user for input
- User provide the expected input to a RequestInput FunctionResponse Event.
- ADK will check the response and use user's own callback validation to continue the tool call.

PiperOrigin-RevId: 797379797
@copybara-service copybara-service bot added the google-contributor [Bot] This PR is created by Google label Aug 22, 2025
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