The Model Context Protocol (MCP) C# SDK has updated its handling of array and scalar tool outputs, moving away from a required object wrapper. With the MCP 2026-07-28 protocol, arrays and scalars are treated directly, eliminating the need for a `result` field within `structuredContent`. This change simplifies data handling and requires clients to adapt to the new wire contract. The SDK's latest versions, particularly v2.2.0, support this direct serialization, while older versions maintain compatibility by still emitting the envelope when necessary. AI
IMPACT Simplifies data handling for developers using the MCP C# SDK by removing a legacy wrapper for tool outputs.
RANK_REASON The article details an update to a specific software development kit (SDK) and its protocol handling, which is a technical improvement rather than a major industry event.
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