Introduce tool.WithConfirmation.

[caglar10ur]

It wraps a toolset to inject confirmation logic in each tool after they created.

[gemini-code-assist]

Summary of Changes

Hello @caglar10ur, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a new WithConfirmation function that allows developers to wrap existing toolsets with human-in-the-loop confirmation logic. This enhancement provides a mechanism to prompt for user approval before a tool's execution, improving control and safety for critical operations. Additionally, common tool packaging logic has been extracted into a utility function, streamlining the ProcessRequest implementation across tools.

Highlights

• Human-in-the-Loop (HITL) Confirmation: Introduced tool.WithConfirmation to wrap toolsets and inject confirmation logic into individual tools, enabling user approval before tool execution.
• Tool Processing Refactoring: Refactored the ProcessRequest method in agentTool to delegate common tool packing logic to a new utility function, toolutils.PackTool.
• Comprehensive Testing: Added a new test suite, TestWithConfirmation, to thoroughly validate the various scenarios and behaviors of the new confirmation mechanism.

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Changelog

• tool/agenttool/agent_tool.go
  • Imported toolutils package.
  • Refactored ProcessRequest to use toolutils.PackTool for handling tool declarations.
• tool/tool.go
  • Updated copyright year to 2026.
  • Introduced ConfirmationProvider type for dynamic confirmation logic.
  • Added WithConfirmation function to wrap a Toolset with confirmation capabilities.
  • Implemented confirmationToolset and confirmationTool structs to manage and apply confirmation logic.
  • Defined runnableTool and requestProcessor interfaces for internal use.
  • Integrated confirmation checks within the Run method of confirmationTool, including handling ToolConfirmation from context and requesting confirmation when necessary.
• tool/tool_test.go
  • Added necessary imports for testing the new confirmation features.
  • Created testContext and testToolset mock implementations for testing.
  • Implemented TestWithConfirmation with multiple test cases to validate confirmation behavior, including successful runs, rejections, and dynamic confirmation via a provider.

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Code Review

This pull request introduces a WithConfirmation wrapper for toolsets, which is a great feature for adding a human-in-the-loop confirmation step for tool execution. The implementation is clean and the addition of a ConfirmationProvider for dynamic confirmation logic is a nice touch. The new functionality is also well-tested. I've found one minor issue regarding some unused code.