Use 'MCP send' prefix for outgoing request spans

Both client and server can send requests, so use 'MCP send' for the
sending side and 'MCP handle' for the receiving side consistently.

Author: Kludex

src/mcp/shared/session.py

@@ -272,7 +272,7 @@ async def send_request(
             jsonrpc_request = JSONRPCRequest(jsonrpc="2.0", id=request_id, **request_data)
 
             target = request_data.get("params", {}).get("name")
-            span_name = f"MCP {request.method} {target}" if target else f"MCP {request.method}"
+            span_name = f"MCP send {request.method} {target}" if target else f"MCP send {request.method}"
 
             with otel_span(
                 span_name,

tests/shared/test_otel.py

@@ -26,10 +26,10 @@ def greet(name: str) -> str:
     spans = capfire.exporter.exported_spans_as_dict()
     span_names = {s["name"] for s in spans}
 
-    assert "MCP tools/call greet" in span_names
+    assert "MCP send tools/call greet" in span_names
     assert "MCP handle tools/call greet" in span_names
 
-    client_span = next(s for s in spans if s["name"] == "MCP tools/call greet")
+    client_span = next(s for s in spans if s["name"] == "MCP send tools/call greet")
     server_span = next(s for s in spans if s["name"] == "MCP handle tools/call greet")
 
     assert client_span["attributes"]["mcp.method.name"] == "tools/call"