Add experimental notice

Author: LucaButBoring

docs/specification/draft/basic/utilities/tasks.mdx

@@ -6,6 +6,13 @@ title: Tasks
 
 <Info>**Protocol Revision**: draft</Info>
 
+<Note>
+
+Tasks are newly-introduced in this version of the MCP specification and are currently considered **experimental**.
+The design of tasks may evolve in future protocol versions.
+
+</Note>
+
 The Model Context Protcol (MCP) allows requestors (which can be either clients or servers, depending on the direction of communication) to augment their requests with **tasks**. Tasks are durable state machines that carry information about the underlying execution state of the request they wrap, and are intended for requestor polling and deferred result retrieval. Each task is uniquely identifiable by a receiver-generated **task ID**.
 
 ## User Interaction Model