move operation name to genaiinvocation, update tool span name

Author: keith-decker

util/opentelemetry-util-genai/src/opentelemetry/util/genai/span_utils.py

@@ -404,7 +404,7 @@ def _get_tool_call_span_name(tool_call: ToolCall) -> str:
 
     Format: "execute_tool {gen_ai.tool.name}"
     """
-    return f"execute_tool {tool_call.name}".strip()
+    return f"{tool_call.operation_name} {tool_call.name}"
 
 
 def _apply_tool_call_attributes(

util/opentelemetry-util-genai/src/opentelemetry/util/genai/types.py

@@ -260,6 +260,7 @@ class GenAIInvocation:
     span: Span | None = None
     attributes: dict[str, Any] = field(default_factory=_new_str_any_dict)
     error_type: str | None = None
+    operation_name: str = ""
 
     monotonic_start_s: float | None = None
     """
@@ -277,7 +278,6 @@ class WorkflowInvocation(GenAIInvocation):
     """
 
     name: str = ""
-    operation_name: str = "invoke_workflow"
     input_messages: list[InputMessage] = field(
         default_factory=_new_input_messages
     )
@@ -297,7 +297,6 @@ class LLMInvocation(GenAIInvocation):
     set by the TelemetryHandler.
     """
 
-    operation_name: str = GenAI.GenAiOperationNameValues.CHAT.value
     request_model: str | None = None
     input_messages: list[InputMessage] = field(
         default_factory=_new_input_messages
@@ -336,6 +335,9 @@ class LLMInvocation(GenAIInvocation):
     server_address: str | None = None
     server_port: int | None = None
 
+    def __post_init__(self) -> None:
+        self.operation_name = GenAI.GenAiOperationNameValues.CHAT.value
+
 
 @dataclass
 class EmbeddingInvocation(GenAIInvocation):
@@ -345,7 +347,6 @@ class EmbeddingInvocation(GenAIInvocation):
     and context_token attributes are set by the TelemetryHandler.
     """
 
-    operation_name: str = GenAI.GenAiOperationNameValues.EMBEDDINGS.value
     request_model: str | None = None
     provider: str | None = None  # e.g., azure.ai.openai, openai, aws.bedrock
     server_address: str | None = None
@@ -372,6 +373,9 @@ class EmbeddingInvocation(GenAIInvocation):
     These attributes will not be set on spans or events.
     """
 
+    def __post_init__(self) -> None:
+        self.operation_name = GenAI.GenAiOperationNameValues.EMBEDDINGS.value
+
 
 @dataclass()
 class ToolCall(GenAIInvocation):
@@ -428,6 +432,9 @@ class ToolCall(GenAIInvocation):
     # Timing field (not inherited from GenAIInvocation, matches LLMInvocation pattern)
     monotonic_start_s: float | None = None
 
+    def __post_init__(self) -> None:
+        self.operation_name = GenAI.GenAiOperationNameValues.EXECUTE_TOOL.value
+
 
 @dataclass
 class Error: