StrandsAgentInstrumentor

API reference for StrandsAgentInstrumentor

StrandsAgentInstrumentor

OpenTelemetry instrumentor for Strands AI agents.

This instrumentor automatically injects FiddlerInstrumentationHook into all Strands Agent instances, enabling automatic observability without manual hook configuration. It also registers a FiddlerSpanProcessor for attribute denormalization.

The instrumentor follows the OpenTelemetry instrumentation pattern and can be enabled/disabled dynamically.

Example

from strands.telemetry import StrandsTelemetry
from fiddler_strandsagents import StrandsAgentInstrumentor

telemetry = StrandsTelemetry()
telemetry.setup_otlp_exporter()

# Enable instrumentation
instrumentor = StrandsAgentInstrumentor(telemetry)
instrumentor.instrument()

# Create agents - hooks are automatically injected
agent = Agent(model=model, system_prompt="...")

Parameters

Parameter	Type	Required	Default	Description
strands_telemetry	StrandsTelemetry	✗	None	StrandsTelemetry instance for configuring trace exporters

instrumentation_dependencies()

Return the list of packages required for instrumentation.

Returns

Collection of package names with version constraints Return type: Collection[str]

instrument()

Enable automatic instrumentation of Strands agents.

Activates the instrumentor by registering the FiddlerSpanProcessor with the tracer provider and patching Agent._init_ to automatically inject FiddlerInstrumentationHook into all agent instances.

This method is idempotent - calling it multiple times has the same effect as calling it once. After activation, all newly created agents will automatically include Fiddler’s instrumentation hook.

Parameters

**kwargs – Additional instrumentation configuration (currently unused)

Example

from strands import Agent
from strands.telemetry import StrandsTelemetry
from fiddler_strandsagents import StrandsAgentInstrumentor

# Set up telemetry
telemetry = StrandsTelemetry()
telemetry.setup_otlp_exporter()

# Activate instrumentation
instrumentor = StrandsAgentInstrumentor(telemetry)
instrumentor.instrument()

# Agents created after this point are automatically instrumented
agent = Agent(model=model, system_prompt="...")

# Check if instrumentation is active
if instrumentor.is_instrumented_by_opentelemetry:
    print("Instrumentation is active")

uninstrument()

Disable automatic instrumentation and restore original behavior.

Deactivates the instrumentor by restoring the original Agent._init_ method. Agents created after calling this method will no longer have FiddlerInstrumentationHook automatically injected.

Note: This does not affect agents that were already created while instrumentation was active - those will retain their hooks.

Parameters

**kwargs – Additional uninstrumentation configuration (currently unused)

Example

from fiddler_strandsagents import StrandsAgentInstrumentor

instrumentor = StrandsAgentInstrumentor(telemetry)
instrumentor.instrument()

# Create some agents (automatically instrumented)
agent1 = Agent(model=model, system_prompt="...")

# Deactivate instrumentation
instrumentor.uninstrument()

# New agents won't be instrumented
agent2 = Agent(model=model, system_prompt="...")

# agent1 still has the hook, agent2 does not

property is_instrumented_by_opentelemetry : bool

Check whether instrumentation is currently active.

Returns

True if the instrumentor has been activated via instrument() and not yet deactivated via uninstrument(), False otherwise

Example

instrumentor = StrandsAgentInstrumentor(telemetry)
print(instrumentor.is_instrumented_by_opentelemetry)  # False

instrumentor.instrument()
print(instrumentor.is_instrumented_by_opentelemetry)  # True

instrumentor.uninstrument()
print(instrumentor.is_instrumented_by_opentelemetry)  # False