add docstring for is_agent_observability_enabled()

Author: yiyuan-he

aws-opentelemetry-distro/src/amazon/opentelemetry/distro/_utils.py

@@ -9,7 +9,7 @@
 
 _logger: Logger = getLogger(__name__)
 
-AGENT_OBSERVABILITY_ENABLED = "AGENT_OBSERVABIILTY_ENABLED"
+AGENT_OBSERVABILITY_ENABLED = "AGENT_OBSERVABILITY_ENABLED"
 
 
 def is_installed(req: str) -> bool:
@@ -27,4 +27,5 @@ def is_installed(req: str) -> bool:
 
 
 def is_agent_observability_enabled() -> bool:
+    """Is the Agentic AI monitoring flag set to true?"""
     return os.environ.get(AGENT_OBSERVABILITY_ENABLED, "false").lower() == "true"