docs: changeset wording aligns with @deprecated overloads (not first-class)

Author: felixweinberger

.changeset/register-rawshape-compat.md

@@ -3,4 +3,4 @@
 '@modelcontextprotocol/server': patch
 ---
 
-`registerTool`/`registerPrompt` accept a raw Zod shape (`{ field: z.string() }`) for `inputSchema`/`outputSchema`/`argsSchema` in addition to a wrapped Standard Schema. Raw shapes are auto-wrapped with `z.object()`. Both forms are first-class.
+`registerTool`/`registerPrompt` accept a raw Zod shape (`{ field: z.string() }`) for `inputSchema`/`outputSchema`/`argsSchema` in addition to a wrapped Standard Schema. Raw shapes are auto-wrapped with `z.object()`. The raw-shape overloads are `@deprecated`; prefer wrapping with `z.object()`.