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Tools

Three Strands tool patterns wired into one TemporalAgent:

Pattern When to use it
@tool from strands Pure, deterministic logic with no I/O. Runs in workflow context.
@activity.defn wrapped via activity_as_tool Anything with I/O, non-determinism, or significant runtime — gets durable retries and timeouts.
strands_tools.<tool> wrapped in an @activity.defn Reuse Strands ecosystem tools (environment, http_request, python_repl, …) while keeping workflow code deterministic.

A single prompt exercises all three. The resulting Temporal history shows an invoke_model for each model turn, plus fetch_weather and environment activity calls; the letter_counter call runs in-workflow and doesn't show up as an activity.

What This Sample Demonstrates

  • Three coexisting tool surfaces on one agent
  • workflow.activity_as_tool carrying per-tool activity options (timeouts)
  • Wrapping strands_tools tools so runtime host access happens in an activity

Running the Sample

# Terminal 1
uv run strands_plugin/tools/run_worker.py

# Terminal 2
uv run strands_plugin/tools/run_workflow.py

Files

File Description
workflow.py The three tools, the TemporalAgent, and ToolsWorkflow
run_worker.py Registers StrandsPlugin + the two activities, starts the worker
run_workflow.py Executes the workflow and prints the result