diff --git a/src/mcp/shared/_httpx_utils.py b/src/mcp/shared/_httpx_utils.py
index 251469eaa..6a121aff6 100644
--- a/src/mcp/shared/_httpx_utils.py
+++ b/src/mcp/shared/_httpx_utils.py
@@ -27,14 +27,12 @@ def create_mcp_http_client(
 ) -> httpx.AsyncClient:
     """Create a standardized httpx AsyncClient with MCP defaults.
 
-    This function provides common defaults used throughout the MCP codebase:
-    - follow_redirects=True (always enabled)
-    - Default timeout of 30 seconds if not specified
+    Always enables follow_redirects and applies an SSE-friendly default timeout.
 
     Args:
         headers: Optional headers to include with all requests.
-        timeout: Request timeout as httpx.Timeout object.
-            Defaults to 30 seconds if not specified.
+        timeout: Request timeout as httpx.Timeout object. Defaults to 30s for
+            connect/write/pool and 300s for read (for long-lived SSE streams).
         auth: Optional authentication handler.
 
     Returns: