diff --git a/docs/community/sdk-tiers.mdx b/docs/community/sdk-tiers.mdx
index e424a9373..4c2d51480 100644
--- a/docs/community/sdk-tiers.mdx
+++ b/docs/community/sdk-tiers.mdx
@@ -20,10 +20,14 @@ tracking with the standardized labels defined below.
 
 SDKs are classified into three tiers based on feature completeness, maintenance commitments, and documentation quality:
 
-- **Tier 1**: Fully supported SDKs with complete protocol implementation
+- **Tier 1**: Fully supported SDKs with complete protocol implementation, including all
+  non-experimental features and optional capabilities like sampling and elicitation
 - **Tier 2**: Actively-maintained SDKs working toward full protocol specification support
 - **Tier 3**: Experimental, partially implemented, or specialized SDKs
 
+Experimental features (such as Tasks) and protocol extensions (such as MCP Apps) are not required
+for any tier.
+
 ## Tier Requirements
 
 | Requirement                 | Tier 1: Fully Supported                                                                  | Tier 2: Commitment to Full Support                               | Tier 3: Experimental   |