diff --git a/src/mcp/types.py b/src/mcp/types.py
index f043fb10a..411a80596 100644
--- a/src/mcp/types.py
+++ b/src/mcp/types.py
@@ -42,7 +42,7 @@ class RequestParams(BaseModel):
     class Meta(BaseModel):
         progressToken: ProgressToken | None = None
         """
-        If specified, the caller is requesting out-of-band progress notifications for
+        If specified, the caller requests out-of-band progress notifications for
         this request (as represented by notifications/progress). The value of this
         parameter is an opaque token that will be attached to any subsequent
         notifications. The receiver is not obligated to provide these notifications.
@@ -782,7 +782,7 @@ class ModelHint(BaseModel):
 
 class ModelPreferences(BaseModel):
     """
-    The server's preferences for model selection, requested of the client during
+    The server's preferences for model selection, requested by the client during
     sampling.
 
     Because LLMs can vary along multiple dimensions, choosing the "best" model is
@@ -1015,7 +1015,7 @@ class CancelledNotification(
     Notification[CancelledNotificationParams, Literal["notifications/cancelled"]]
 ):
     """
-    This notification can be sent by either side to indicate that it is cancelling a
+    This notification can be sent by either side to indicate that it is canceling a
     previously-issued request.
     """