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The surrounding sentence names 2026-07-28 as the revision that first allows an array-rooted schema, but the link pointed at /draft, which moves on to the next revision and stops matching the claim. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
9 lines
717 B
Markdown
9 lines
717 B
Markdown
# A Simple MCP Weather Server written in Rust
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See the [Build an MCP server](https://modelcontextprotocol.io/docs/develop/build-server) tutorial for more information.
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## Structured content
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Both tools declare an `output_schema` and return `structured_content`. `get_forecast` returns an object; `get_alerts` returns a top-level JSON array, which protocol revision `2026-07-28` is the first to allow — see [Structured Content](https://modelcontextprotocol.io/specification/2026-07-28/server/tools#structured-content) in the spec.
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Note that an array-rooted schema requires a `2026-07-28` client: rmcp sends it as written on every connection rather than projecting it down, so an older client rejects the tool list.
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