Tools - Agent SDK for Go

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/

Examples in this group

Directory	Demonstrates
`basic`	Built-in tools — echo, calculator, weather, wikipedia, search with auto-approval
`approval`	`WithApprovalHandler` — approve or reject each tool (`Run`)
`authorizer`	`ToolAuthorizer` — programmatic deny before execution
`custom`	Custom tool via `WithTools`
`dynamic_registry`	`ToolRegistry().Register` between runs

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

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"

Learn more

Tools

Registration and execution modes

Approvals

Approval policies and handlers