Invisible Agent Tool Call Failures
warningreliabilityUpdated Jun 23, 2025
Multi-step agent workflows fail at specific tool invocation stages, but lack of granular tracing makes debugging difficult and prolongs incident resolution time.
Sources
Technologies:
How to detect:
Monitor run_error filtered by run_type='tool'. Track trace-level success rates and inspect trace structures to identify tool call failures in multi-step reasoning chains. Look for patterns in error types and specific tool names.
Recommended action:
Enable detailed tracing with LangSmith to visualize complete agent reasoning chains including tool calls. Use trace inspection to drill down into each tool invocation's inputs/outputs. Set up filtered error alerts specifically for tool runs to detect failures in search engines, calculators, or API integrations.