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The agent_with_tools family demonstrates WithTools, WithToolRegistry, WithApprovalHandler, ToolAuthorizer, and the dynamic registry API. Each sub-example isolates one aspect of tool configuration so you can see exactly what each API controls. Source: examples/agent_with_tools/

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Examples in this group

DirectoryDemonstrates
basicBuilt-in tools — echo, calculator, weather, wikipedia, search with auto-approval
approvalWithApprovalHandler — approve or reject each tool (Run)
authorizerToolAuthorizer — programmatic deny before execution
customCustom tool via WithTools
dynamic_registryToolRegistry().Register between runs

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Run

From examples/: 
go run ./agent_with_tools/basic "What's the weather in Tokyo?"
go run ./agent_with_tools/approval "What is 15 + 27?"
go run ./agent_with_tools/authorizer "Get the protected note for roadmap."
go run ./agent_with_tools/custom "Reverse 'hello world'"
go run ./agent_with_tools/dynamic_registry

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Expected output

# basic — auto-approval, answer printed directly
The current weather in Tokyo is 18°C, partly cloudy with light winds.

# approval — prompt appears for each tool call
Tool call: calculator({"expression":"15+27"})
Approve? [y/n]: y
15 + 27 = 42

# authorizer — programmatic deny
Access denied: you do not have permission to access the protected note.

# custom — custom Reverse tool
"hello world" reversed is "dlrow olleh"

# dynamic_registry — tool added between runs
[Run 1] No tools available.
[Run 2] reversed: "dlrow olleh"

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Learn more

Tools

Registration and execution modes

Approvals

Approval policies and handlers

Dynamic Capabilities

Runtime tool registry