eslint: improve documentation for rule meta properties

types/eslint/index.d.ts

@@ -552,23 +552,45 @@ export namespace Rule {
 
     interface RuleMetaData {
         docs?: {
-            /** Provides the short description of the rule in the [rules index](https://eslint.org/docs/rules/) */
+            /** Provides a short description of the rule. */
             description?: string | undefined;
-            /** Specifies the heading under which the rule is listed in the [rules index](https://eslint.org/docs/rules/) */
+            /**
+             * TODO: remove this field in next major release of @types/eslint.
+             * @deprecated no longer used
+             */
             category?: string | undefined;
-            /** Is whether the `"extends": "eslint:recommended"` property in a [configuration file](https://eslint.org/docs/user-guide/configuring#extending-configuration-files) enables the rule */
+            /** Whether the rule is enabled in the plugin's `recommended` configuration. */
             recommended?: boolean | undefined;
-            /** Specifies the URL at which the full documentation can be accessed */
+            /** Specifies the URL at which the full documentation can be accessed (enabling code editors to provide a helpful link on highlighted rule violations). */
             url?: string | undefined;
-            /** Specifies whether rules can return suggestions (defaults to false if omitted) */
+            /**
+             * TODO: remove this field in next major release of @types/eslint.
+             * @deprecated use `meta.hasSuggestions` instead
+             */
             suggestion?: boolean | undefined;
         } | undefined;
+        /** Violation and suggestion messages. */
         messages?: { [messageId: string]: string } | undefined;
+        /**
+         * Specifies if the `--fix` option on the command line automatically fixes problems reported by the rule.
+         * Mandatory for fixable rules.
+         */
         fixable?: "code" | "whitespace" | undefined;
+        /** Specifies the [options](https://eslint.org/docs/latest/developer-guide/working-with-rules#options-schemas) so ESLint can prevent invalid [rule configurations](https://eslint.org/docs/latest/user-guide/configuring/rules#configuring-rules). */
         schema?: JSONSchema4 | JSONSchema4[] | undefined;
+        /** Indicates whether the rule has been deprecated. Omit if not deprecated. */
         deprecated?: boolean | undefined;
+        /**
+         * Indicates the type of rule:
+         * - `"problem"` means the rule is identifying code that either will cause an error or may cause a confusing behavior. Developers should consider this a high priority to resolve.
+         * - `"suggestion"` means the rule is identifying something that could be done in a better way but no errors will occur if the code isn’t changed.
+         * - `"layout"` means the rule cares primarily about whitespace, semicolons, commas, and parentheses, all the parts of the program that determine how the code looks rather than how it executes. These rules work on parts of the code that aren’t specified in the AST.
+         */
         type?: "problem" | "suggestion" | "layout" | undefined;
-        /** Specifies whether rules can return suggestions (defaults to false if omitted) */
+        /**
+         * Specifies whether the rule can return suggestions (defaults to `false` if omitted).
+         * Mandatory for rules that provide suggestions.
+         */
         hasSuggestions?: boolean | undefined;
     }