Update articles/ai-foundry/concepts/observability.md

Co-authored-by: changliu2 <[email protected]>

Author: lgayhardt

articles/ai-foundry/concepts/observability.md

@@ -89,7 +89,7 @@ To learn more, see [Risk and safety evaluators](./evaluation-evaluators/risk-saf
 |--|--|--|
 | Intent Resolution | Measures how accurately the agent identifies and addresses user intentions.| Query, response |
 | Task Adherence | Measures how well the agent follows through on identified tasks. | Query, response |
-| Tool Call Accuracy | Measures how well the agent selects and calls the correct tools to.| Query, tool calls, tool definitions |
+| Tool Call Accuracy | Measures how well the agent selects and calls the correct tools to.| Query, either response or tool calls, tool definitions |
 
 To learn more, see [Agent evaluators](./evaluation-evaluators/agent-evaluators.md).