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Clarify McpMetaAttribute documentation scope #1242

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stephentoub merged 2 commits into from
Feb 3, 2026
+9 −1
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Clarify McpMetaAttribute documentation scope #1242

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Clarify McpMetaAttribute documentation to explain scope of metadata a…
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10 changes: 9 additions & 1 deletion src/ModelContextProtocol.Core/Server/McpMetaAttribute.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -11,7 +11,15 @@ namespace ModelContextProtocol.Server;
/// <remarks>
/// <para>
/// The metadata is used to populate the <see cref="Tool.Meta"/>, <see cref="Prompt.Meta"/>,
/// or <see cref="Resource.Meta"/> property of the corresponding primitive.
/// or <see cref="Resource.Meta"/> property of the corresponding primitive. This metadata is
/// included in the responses to listing operations (<c>tools/list</c>, <c>prompts/list</c>,
/// <c>resources/list</c>).
/// </para>
/// <para>
/// This metadata is <b>not</b> propagated to the results of invocation operations such as
/// <c>tools/call</c>, <c>prompts/get</c>, or <c>resources/read</c>. To include metadata in
/// those results, set the <c>Meta</c> property on the <see cref="CallToolResult"/>,
/// <see cref="GetPromptResult"/>, or <see cref="ReadResourceResult"/> directly in your method implementation.
/// </para>
/// <para>
/// This attribute can be applied multiple times to a method to specify multiple key/value pairs
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