docs(spec): regenerate the action reference for the reworded describe() (#3923)

`content/docs/references/*` is generated from the spec's `describe()` strings,
so the previous commit's rewording left it out of sync and the `check:docs` gate
failed. Regenerated via `gen:schema && gen:docs`.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Author: 2 people

content/docs/references/ui/action.mdx

@@ -100,7 +100,7 @@ const result = Action.parse(data);
 | **visible** | `string \| { dialect: Enum<'cel' \| 'cron' \| 'template'>; source?: string; ast?: any; meta?: object }` | optional | Visibility predicate (CEL). |
 | **requiresFeature** | `Enum<'twoFactor' \| 'passkeys' \| 'magicLink' \| 'organization' \| 'multiOrgEnabled' \| 'degradedTenancy' \| 'oidcProvider' \| 'sso' \| 'ssoEnforced' \| 'deviceAuthorization' \| 'admin' \| 'phoneNumber' \| 'phoneNumberOtp'>` | optional | Public auth feature flag gating this action; lowered into `visible` at parse time. |
 | **disabled** | `boolean \| string \| { dialect: Enum<'cel' \| 'cron' \| 'template'>; source?: string; ast?: any; meta?: object }` | optional | Boolean or predicate (CEL) — action is disabled when TRUE. |
-| **requiredPermissions** | `string[]` | optional | [ADR-0066 D4] Capabilities required to invoke this action (server-enforced 403 + UI hide/disable). |
+| **requiredPermissions** | `string[]` | optional | [ADR-0066 D4] Capabilities required to invoke this action. Enforced with 403 on the platform action route (script/flow/modal + MCP) and mirrored as a UI hide; a `type: api` action pointed at a custom endpoint must re-check it there. |
 | **shortcut** | `string` | optional | Keyboard shortcut to trigger this action (e.g., "Ctrl+S") |
 | **bulkEnabled** | `boolean` | optional | Whether this action can be applied to multiple selected records |
 | **ai** | `{ exposed?: boolean; description?: string; category?: Enum<'data' \| 'action' \| 'flow' \| 'integration' \| 'vector_search' \| 'analytics' \| 'utility'>; paramHints?: Record<string, { description?: string; enum?: string \| number[]; examples?: any[] }>; … }` | optional | AI exposure (opt-in). Set ai.exposed=true + ai.description to make this callable by agents. |