diff --git a/types/tools/block-tool.d.ts b/types/tools/block-tool.d.ts
index ddf47896..740a7a22 100644
--- a/types/tools/block-tool.d.ts
+++ b/types/tools/block-tool.d.ts
@@ -13,9 +13,15 @@ import { MenuConfig } from './menu-config';
  */
 export interface BlockTool extends BaseTool {
   /**
-   * Sanitizer rules description
+   * Sanitizer rules description.
+   *
+   * @example Flat config (tag-level rules applied to all output)
+   * { b: true, a: { href: true } }
+   *
+   * @example Per-field config
+   * { text: { br: true, b: true }, caption: { b: true, i: true } }
    */
-  sanitize?: SanitizerConfig;
+  sanitize?: SanitizerConfig | Record<string, SanitizerConfig>;
 
   /**
    * Process Tool's element in DOM and return raw data
diff --git a/types/tools/tool.d.ts b/types/tools/tool.d.ts
index 17aa0f2d..2605911e 100644
--- a/types/tools/tool.d.ts
+++ b/types/tools/tool.d.ts
@@ -37,9 +37,12 @@ export interface BaseToolConstructable {
   isInline?: boolean;
 
   /**
-   * Tool`s sanitizer configuration
+   * Tool`s sanitizer configuration.
+   *
+   * For Block Tools, can be a Record mapping data field names to their SanitizerConfig.
+   * For Inline Tools, should be a flat SanitizerConfig with tag names as keys.
    */
-  sanitize?: SanitizerConfig;
+  sanitize?: SanitizerConfig | Record<string, SanitizerConfig>;
 
   /**
    * Title of Inline Tool.