diff --git a/packages/types/src/checkin.ts b/packages/types/src/checkin.ts
index 02811295870e..9d200811183a 100644
--- a/packages/types/src/checkin.ts
+++ b/packages/types/src/checkin.ts
@@ -2,7 +2,7 @@ import type { TraceContext } from './context';
 
 interface CrontabSchedule {
   type: 'crontab';
-  // The crontab schedule string, e.g. 0 * * * *.
+  /** The crontab schedule string, e.g. 0 * * * *. */
   value: string;
 }
 
@@ -14,32 +14,37 @@ interface IntervalSchedule {
 
 type MonitorSchedule = CrontabSchedule | IntervalSchedule;
 
-// https://develop.sentry.dev/sdk/check-ins/
 export interface SerializedCheckIn {
-  // Check-In ID (unique and client generated).
+  /** Check-In ID (unique and client generated). */
   check_in_id: string;
-  // The distinct slug of the monitor.
+  /** The distinct slug of the monitor. */
   monitor_slug: string;
-  // The status of the check-in.
+  /** The status of the check-in. */
   status: 'in_progress' | 'ok' | 'error';
-  // The duration of the check-in in seconds. Will only take effect if the status is ok or error.
+  /** The duration of the check-in in seconds. Will only take effect if the status is ok or error. */
   duration?: number;
   release?: string;
   environment?: string;
   monitor_config?: {
     schedule: MonitorSchedule;
-    // The allowed allowed margin of minutes after the expected check-in time that
-    // the monitor will not be considered missed for.
+    /**
+     * The allowed allowed margin of minutes after the expected check-in time that
+     * the monitor will not be considered missed for.
+     */
     checkin_margin?: number;
-    // The allowed allowed duration in minutes that the monitor may be `in_progress`
-    // for before being considered failed due to timeout.
+    /**
+     * The allowed allowed duration in minutes that the monitor may be `in_progress`
+     * for before being considered failed due to timeout.
+     */
     max_runtime?: number;
-    // A tz database string representing the timezone which the monitor's execution schedule is in.
-    // See: https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
+    /**
+     * A tz database string representing the timezone which the monitor's execution schedule is in.
+     * See: https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
+     */
     timezone?: string;
-    // How many consecutive failed check-ins it takes to create an issue.
+    /** How many consecutive failed check-ins it takes to create an issue. */
     failure_issue_threshold?: number;
-    // How many consecutive OK check-ins it takes to resolve an issue.
+    /** How many consecutive OK check-ins it takes to resolve an issue. */
     recovery_threshold?: number;
   };
   contexts?: {
@@ -48,27 +53,27 @@ export interface SerializedCheckIn {
 }
 
 export interface HeartbeatCheckIn {
-  // The distinct slug of the monitor.
+  /** The distinct slug of the monitor. */
   monitorSlug: SerializedCheckIn['monitor_slug'];
-  // The status of the check-in.
+  /** The status of the check-in. */
   status: 'ok' | 'error';
 }
 
 export interface InProgressCheckIn {
-  // The distinct slug of the monitor.
+  /** The distinct slug of the monitor. */
   monitorSlug: SerializedCheckIn['monitor_slug'];
-  // The status of the check-in.
+  /** The status of the check-in. */
   status: 'in_progress';
 }
 
 export interface FinishedCheckIn {
-  // The distinct slug of the monitor.
+  /** The distinct slug of the monitor. */
   monitorSlug: SerializedCheckIn['monitor_slug'];
-  // The status of the check-in.
+  /** The status of the check-in. */
   status: 'ok' | 'error';
-  // Check-In ID (unique and client generated).
+  /** Check-In ID (unique and client generated). */
   checkInId: SerializedCheckIn['check_in_id'];
-  // The duration of the check-in in seconds. Will only take effect if the status is ok or error.
+  /** The duration of the check-in in seconds. Will only take effect if the status is ok or error. */
   duration?: SerializedCheckIn['duration'];
 }
 
@@ -77,18 +82,27 @@ export type CheckIn = HeartbeatCheckIn | InProgressCheckIn | FinishedCheckIn;
 type SerializedMonitorConfig = NonNullable<SerializedCheckIn['monitor_config']>;
 
 export interface MonitorConfig {
+  /**
+   * The schedule on which the monitor should run. Either a crontab schedule string or an interval.
+   */
   schedule: MonitorSchedule;
-  // The allowed allowed margin of minutes after the expected check-in time that
-  // the monitor will not be considered missed for.
+  /**
+   * The allowed allowed margin of minutes after the expected check-in time that
+   * the monitor will not be considered missed for.
+   */
   checkinMargin?: SerializedMonitorConfig['checkin_margin'];
-  // The allowed allowed duration in minutes that the monitor may be `in_progress`
-  // for before being considered failed due to timeout.
+  /**
+   * The allowed allowed duration in minutes that the monitor may be `in_progress`
+   * for before being considered failed due to timeout.
+   */
   maxRuntime?: SerializedMonitorConfig['max_runtime'];
-  // A tz database string representing the timezone which the monitor's execution schedule is in.
-  // See: https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
+  /**
+   * A tz database string representing the timezone which the monitor's execution schedule is in.
+   * See: https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
+   */
   timezone?: SerializedMonitorConfig['timezone'];
-  // How many consecutive failed check-ins it takes to create an issue.
+  /** How many consecutive failed check-ins it takes to create an issue. */
   failureIssueThreshold?: SerializedMonitorConfig['failure_issue_threshold'];
-  // How many consecutive OK check-ins it takes to resolve an issue.
+  /** How many consecutive OK check-ins it takes to resolve an issue. */
   recoveryThreshold?: SerializedMonitorConfig['recovery_threshold'];
 }