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ensure we properly fail tools and emit their events

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lorenzejay
2026-01-22 10:36:11 -08:00
parent 0d4ff5d80c
commit d0af4c6331
7 changed files with 4179 additions and 13024 deletions
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16
lib/crewai/src/crewai/agents/crew_agent_executor.py
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@@ -544,6 +544,7 @@ class CrewAgentExecutor(CrewAgentExecutorMixin):
from crewai.events import crewai_event_bus
from crewai.events.types.tool_usage_events import (
ToolUsageErrorEvent,
ToolUsageFinishedEvent,
ToolUsageStartedEvent,
)
@@ -611,6 +612,8 @@ class CrewAgentExecutor(CrewAgentExecutorMixin):
else:
args_dict = func_args
agent_key = getattr(self.agent, "key", "unknown") if self.agent else "unknown"
# Emit tool usage started event
started_at = datetime.now()
crewai_event_bus.emit(
@@ -620,6 +623,7 @@ class CrewAgentExecutor(CrewAgentExecutorMixin):
tool_args=args_dict,
from_agent=self.agent,
from_task=self.task,
agent_key=agent_key,
),
)
@@ -633,6 +637,17 @@ class CrewAgentExecutor(CrewAgentExecutorMixin):
result = str(result)
except Exception as e:
result = f"Error executing tool: {e}"
crewai_event_bus.emit(
self,
event=ToolUsageErrorEvent(
tool_name=func_name,
tool_args=args_dict,
from_agent=self.agent,
from_task=self.task,
agent_key=agent_key,
error=e,
),
)
# Emit tool usage finished event
crewai_event_bus.emit(
@@ -643,6 +658,7 @@ class CrewAgentExecutor(CrewAgentExecutorMixin):
tool_args=args_dict,
from_agent=self.agent,
from_task=self.task,
agent_key=agent_key,
started_at=started_at,
finished_at=datetime.now(),
),

20
lib/crewai/src/crewai/experimental/agent_executor.py
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@@ -27,6 +27,7 @@ from crewai.events.types.logging_events import (
AgentLogsStartedEvent,
)
from crewai.events.types.tool_usage_events import (
ToolUsageErrorEvent,
ToolUsageFinishedEvent,
ToolUsageStartedEvent,
)
@@ -581,6 +582,11 @@ class AgentExecutor(Flow[AgentReActState], CrewAgentExecutorMixin):
else:
args_dict = func_args
# Get agent_key for event tracking
agent_key = (
getattr(self.agent, "key", "unknown") if self.agent else "unknown"
)
# Emit tool usage started event
started_at = datetime.now()
crewai_event_bus.emit(
@@ -590,6 +596,7 @@ class AgentExecutor(Flow[AgentReActState], CrewAgentExecutorMixin):
tool_args=args_dict,
from_agent=self.agent,
from_task=self.task,
agent_key=agent_key,
),
)
@@ -603,6 +610,18 @@ class AgentExecutor(Flow[AgentReActState], CrewAgentExecutorMixin):
result = str(result)
except Exception as e:
result = f"Error executing tool: {e}"
# Emit tool usage error event
crewai_event_bus.emit(
self,
event=ToolUsageErrorEvent(
tool_name=func_name,
tool_args=args_dict,
from_agent=self.agent,
from_task=self.task,
agent_key=agent_key,
error=e,
),
)
# Emit tool usage finished event
crewai_event_bus.emit(
@@ -613,6 +632,7 @@ class AgentExecutor(Flow[AgentReActState], CrewAgentExecutorMixin):
tool_args=args_dict,
from_agent=self.agent,
from_task=self.task,
agent_key=agent_key,
started_at=started_at,
finished_at=datetime.now(),
),

50
lib/crewai/tests/agents/test_native_tool_calling.py
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@@ -57,6 +57,12 @@ class WeatherTool(BaseTool):
"""Get weather (mock implementation)."""
return f"The weather in {location} is sunny with a temperature of 72°F"
class FailingTool(BaseTool):
"""A tool that always fails."""
name: str = "failing_tool"
description: str = "This tool always fails"
def _run(self) -> str:
raise Exception("This tool always fails")
@pytest.fixture
def calculator_tool() -> CalculatorTool:
@@ -69,6 +75,12 @@ def weather_tool() -> WeatherTool:
"""Create a weather tool for testing."""
return WeatherTool()
@pytest.fixture
def failing_tool() -> BaseTool:
"""Create a weather tool for testing."""
return FailingTool(
)
# =============================================================================
# OpenAI Provider Tests
@@ -481,3 +493,41 @@ class TestNativeToolCallingTokenUsage:
print(f" Prompt tokens: {result.token_usage.prompt_tokens}")
print(f" Completion tokens: {result.token_usage.completion_tokens}")
print(f" Total tokens: {result.token_usage.total_tokens}")
@pytest.mark.vcr()
def test_native_tool_calling_error_handling(failing_tool: FailingTool):
"""Test that native tool calling handles errors properly and emits error events."""
import threading
from crewai.events import crewai_event_bus
from crewai.events.types.tool_usage_events import ToolUsageErrorEvent
received_events = []
event_received = threading.Event()
@crewai_event_bus.on(ToolUsageErrorEvent)
def handle_tool_error(source, event):
received_events.append(event)
event_received.set()
agent = Agent(
role="Calculator",
goal="Perform calculations efficiently",
backstory="You calculate things.",
tools=[failing_tool],
llm=LLM(model="gpt-4o-mini"),
verbose=False,
max_iter=3,
)
result = agent.kickoff("Use the failing_tool to do something.")
assert result is not None
# Verify error event was emitted
assert event_received.wait(timeout=10), "ToolUsageErrorEvent was not emitted"
assert len(received_events) >= 1
# Verify event attributes
error_event = received_events[0]
assert error_event.tool_name == "failing_tool"
assert error_event.agent_role == agent.role
assert "This tool always fails" in str(error_event.error)

350
lib/crewai/tests/cassettes/agents/test_native_tool_calling_error_handling.yaml Normal file
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16257
lib/crewai/tests/cassettes/utilities/test_tools_emits_error_events.yaml
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502
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8
lib/crewai/tests/utilities/test_events.py
View File

@@ -426,7 +426,8 @@ def test_tools_emits_error_events():
def handle_tool_end(source, event):
with lock:
received_events.append(event)
if len(received_events) >= 48:
# Set event when we receive at least 1 error event
if len(received_events) >= 1:
all_events_received.set()
class ErrorTool(BaseTool):
@@ -458,10 +459,11 @@ def test_tools_emits_error_events():
crew = Crew(agents=[agent], tasks=[task], name="TestCrew")
crew.kickoff()
assert all_events_received.wait(timeout=5), (
assert all_events_received.wait(timeout=10), (
"Timeout waiting for tool usage error events"
)
assert len(received_events) == 48
# At least one error event should be received (number varies by execution path)
assert len(received_events) >= 1
assert received_events[0].agent_key == agent.key
assert received_events[0].agent_role == agent.role
assert received_events[0].tool_name == "error_tool"