fix: prevent double tool invocation in ToolUsage._use/_ause (#7449) - #7454
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…c#7449)The inner try/except around tool.invoke()/ainvoke() caught anyexception from the tool's own execution, not just schema-filteringfailures, causing a second unfiltered invoke() call within the sameouter parsing attempt. tool.invoke()/ainvoke() is now called exactlyonce per outer attempt; the try/except only guards argument-schemafiltering.Adds a regression test confirming the tool is invoked at most_max_parsing_attempts times (not 2x that) when it fails at runtime.
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Included review availability: Your plan provides up to 10 included reviews per hour; 8 remain after this review. 📝 WalkthroughWalkthroughThe async and sync tool invocation paths now perform one invocation after argument filtering. On filtering failure, they pass the original arguments. Regression coverage verifies three invocations across three failing parsing attempts. ChangesTool invocation retry handling
Suggested reviewers: Priority: ➖ Normal Severity of issue fixed: Medium Merge Risk: ⚪ Minimal · up to The change prevents duplicate tool execution during retries, including for async tools, with regression coverage for the intended invocation counts. No actionable merge risk remains. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
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Inline comments:
In `@lib/crewai/tests/tools/test_tool_usage.py`:
- Around line 906-970: Extend the regression coverage around ToolUsage._ause
with an async failing-tool test that tracks tool.ainvoke calls and asserts
exactly one invocation per parsing attempt, matching the existing ToolUsage.use
test. Configure the test for persistent runtime failure, exercise the async
path, and verify the expected total across all attempts.
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lib/crewai/src/crewai/tools/tool_usage.pylib/crewai/tests/tools/test_tool_usage.py
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…single_invocation_per_attempt_on_failure butexercises the _ause/tool.ainvoke path. Addresses CodeRabbit reviewfeedback on PR crewAIInc#7454.Note: async tests cannot be executed locally on Windows in this repodue to a pre-existing, unrelated pytest-recording/asyncio ProactorEventLoopsocket-guard conflict (confirmed against tests/agents/test_async_agent_executor.pyon unmodified code). This test will run under CI (Linux).
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Fixes #7449.
Problem
ToolUsage._use/_ausewrapped both the argument-schema filtering and thetool.invoke()/ainvoke()call inside the sametry/except Exception. This meant any runtime error raised by the tool's own function body (not just a schema-filtering failure) triggered a second, unfiltered invocation within the same outer parsing attempt — doubling tool calls per attempt. With the default_max_parsing_attempts=3, a persistently failing tool was invoked 6 times instead of 3.For tools with non-idempotent side effects, this doubles duplicate-effect exposure beyond what the outer retry loop already accounts for.
Fix
Narrowed the
try/exceptto only guard the schema-extraction/filtering step.tool.invoke()/tool.ainvoke()is now called exactly once per outer attempt, outside thetry. Runtime errors from the tool now propagate to the outer retry loop as expected, instead of triggering a silent second invocation.Testing
Added a regression test (
test_tool_usage_single_invocation_per_attempt_on_failure) confirming a persistently-failing tool is invoked exactly_max_parsing_attemptstimes, not double that. Verified the existing test suite fortool_usage.pyshows no new failures from this change.