c99de72f48
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>
11 lines
1,021 B
Markdown
11 lines
1,021 B
Markdown
# An LLM-Powered Chatbot MCP Client written in Ruby
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See the [Build an MCP client](https://modelcontextprotocol.io/docs/develop/build-client) tutorial for more information.
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## Structured content
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The spec says clients SHOULD validate structured results against the schema the tool declares, and this SDK's client does not do it for you — `MCP::Client::Tool#output_schema` hands back the raw schema from the wire and nothing checks results against it. So the client compiles each declared schema once at connect time with `MCP::Tool::OutputSchema.new` and validates every non-error result.
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The two channels go to different readers: `content` is forwarded to the model, while `structured_content` is used as data — when a tool returns an array, the client counts its items rather than re-reading the prose. See [Structured Content](https://modelcontextprotocol.io/specification/2026-07-28/server/tools#structured-content).
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`MCP::Client::Stdio` offers `2026-07-28` by default, so no negotiation setup is needed here.
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