Trim JSDoc comment on BlockTool.sanitize

Remove prose paragraph and opinionated "recommended" annotation,
keeping the @example blocks that clearly demonstrate both usage modes.

Author: costajohnt

types/tools/block-tool.d.ts

@@ -15,13 +15,10 @@ export interface BlockTool extends BaseTool {
   /**
    * Sanitizer rules description.
    *
-   * Can be a flat SanitizerConfig (tag-level rules applied to all output)
-   * or a Record mapping data field names to their individual SanitizerConfig.
-   *
-   * @example Flat (tag-level) config
+   * @example Flat config (tag-level rules applied to all output)
    * { b: true, a: { href: true } }
    *
-   * @example Per-field config (recommended for tools with structured data)
+   * @example Per-field config
    * { text: { br: true, b: true }, caption: { b: true, i: true } }
    */
   sanitize?: SanitizerConfig | Record<string, SanitizerConfig>;