MCP TypeScript SDK (V2)
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    SpecTypes: {
        [K in SchemaKey as StripSchemaSuffix<K>]: SchemaFor<K> extends z.ZodType
            ? z.output<SchemaFor<K>>
            : never
    }

    Maps each SpecTypeName to its TypeScript type.

    SpecTypes['CallToolResult'] is equivalent to importing the CallToolResult type directly.