diff --git a/core/code/filters.js b/core/code/filters.js
index 172af279d..69c545998 100644
--- a/core/code/filters.js
+++ b/core/code/filters.js
@@ -1,71 +1,26 @@
-/* Filters API
-
-Filters API is a mechanism to hide intel entities using their properties (faction,
-health, timestamp...). It provides two level APIs: a set of named filters that
-apply globally (any entity matching one of the filters will be hidden), and low
-level API to test an entity against a filter for generic purpose.
-This comes with a Leaflet layer system following the old layer system, the filter
-is disabled when the layer is added to the map and is enabled when removed.
-
-A filter applies to a combinaison of portal/link/field and is described by
- - data properties that must (all) match
- - or a predicate for complex filter
-
-  { portal: true, link: true, data: { team: 'E' }}
-      filters any ENL portal/link
-
-  [{ link: true, data: { oGuid: "some guid" }}, { link: true, data: { dGuid: "some guid" }}]
-      filters any links on portal with guid "some guid"
-
-  { field: true, pred: function (f) { return f.options.timestamp < Date.parse('2021-10-31'); } }
-      filters any fields made before Halloween 2021
-
-Data properties can be specified as value, or as a complex expression (required
-for array data properties). A complex expression is a 2-array, first element is
-an operator, second is the argument of the operator for the property.
-The operators are:
- - ['eq', value] : this is equivalent to type directly `value`
- - ['not', ]
- - ['or', [exp1, exp2,...]]: the expression matches if one of the exp1.. matches
- - ['and', [exp1, exp2...]]: matches if all exp1 matches (useful for array
-  properties)
- - ['some', exp]: when the property is an array, matches if one of the element
-  matches `exp`
- - ['every', exp]: all elements must match `exp`
- - ['<', number]: for number comparison (and <= > >=)
-
-Examples:
-  { portal: true, data:  ['not', { history: { scoutControlled: false }, ornaments:
-  ['some', 'sc5_p'] }] }
-      filters all portals but the one never scout controlled that have a scout
-      volatile ornament
-
-  { portal: true, data: ['not', { resonators: ['every', { owner: 'some agent' } ] } ] }
-      filters all portals that have resonators not owned from 'some agent'
-      (note: that would need to load portal details)
+/* global IITC, L */
 
-  { portal: true, data: { level: ['or', [1,4,5]], health: ['>', 85] } }
-      filters all portals with level 1,4 or 5 and health over 85
+/** # Filters API
 
-  { portal: true, link: true, field: true, options: { timestamp: ['<',
-  Date.now() - 3600000] } }
-      filters all entities with no change since 1 hour (from the creation of
-      the filter)
+  @memberof IITC
+  @namespace filters
 */
 
 IITC.filters = {};
 /**
- * @type {Object.<string, FilterDesc>}
+ * @type {Object.<string, IITC.filters.FilterDesc>}
  */
 IITC.filters._filters = {};
 
 /**
+ * @memberof IITC.filters
  * @callback FilterPredicate
  * @param {Object} ent - IITC entity
  * @returns {boolean}
  */
 
 /**
+ * @memberof IITC.filters
  * @typedef FilterDesc
  * @type {object}
  * @property {boolean} filterDesc.portal         apply to portal
@@ -73,21 +28,35 @@ IITC.filters._filters = {};
  * @property {boolean} filterDesc.field          apply to field
  * @property {object} [filterDesc.data]          entity data properties that must match
  * @property {object} [filterDesc.options]       entity options that must match
- * @property {FilterPredicate} [filterDesc.pred] predicate on the entity
+ * @property {IITC.filters.FilterPredicate} [filterDesc.pred] predicate on the entity
  */
 
 /**
+ * Sets or updates a filter with a given name. If a filter with the same name already exists, it is overwritten.
+ *
  * @param {string} name                              filter name
- * @param {FilterDesc | FilterDesc[]} filterDesc     filter description (OR)
+ * @param {IITC.filters.FilterDesc | IITC.filters.FilterDesc[]} filterDesc     filter description (OR)
  */
 IITC.filters.set = function (name, filterDesc) {
   IITC.filters._filters[name] = filterDesc;
 };
 
+/**
+ * Checks if a filter with the specified name exists.
+ *
+ * @param {string} name - The name of the filter to check.
+ * @returns {boolean} True if the filter exists, false otherwise.
+ */
 IITC.filters.has = function (name) {
   return name in IITC.filters._filters;
 };
 
+/**
+ * Removes a filter with the specified name.
+ *
+ * @param {string} name - The name of the filter to be removed.
+ * @returns {boolean} True if the filter was successfully deleted, false otherwise.
+ */
 IITC.filters.remove = function (name) {
   return delete IITC.filters._filters[name];
 };
@@ -188,10 +157,11 @@ function genericCompare(constraint, object) {
 }
 
 /**
+ * Tests whether a given entity matches a specified filter.
  *
  * @param {"portal"|"link"|"field"} type Type of the entity
  * @param {object} entity Portal/link/field to test
- * @param {FilterDesc} filter Filter
+ * @param {IITC.filters.FilterDesc} filter Filter
  * @returns {boolean} `true` if the the `entity` of type `type` matches the `filter`
  */
 IITC.filters.testFilter = function (type, entity, filter) {
@@ -221,6 +191,7 @@ function arrayFilter(type, entity, filters) {
 }
 
 /**
+ * Tests whether a given portal matches any of the currently active filters.
  *
  * @param {object} portal Portal to test
  * @returns {boolean} `true` if the the portal matches one of the filters
@@ -230,6 +201,7 @@ IITC.filters.filterPortal = function (portal) {
 };
 
 /**
+ * Tests whether a given link matches any of the currently active filters.
  *
  * @param {object} link Link to test
  * @returns {boolean} `true` if the the link matches one of the filters
@@ -239,6 +211,7 @@ IITC.filters.filterLink = function (link) {
 };
 
 /**
+ * Tests whether a given field matches any of the currently active filters.
  *
  * @param {object} field Field to test
  * @returns {boolean} `true` if the the field matches one of the filters
@@ -247,6 +220,10 @@ IITC.filters.filterField = function (field) {
   return arrayFilter('field', field, Object.values(IITC.filters._filters));
 };
 
+/**
+ * Applies all existing filters to the entities (portals, links, and fields) on the map.
+ * Entities that match any of the active filters are removed from the map; others are added or remain on the map.
+ */
 IITC.filters.filterEntities = function () {
   for (const guid in window.portals) {
     const p = window.portals[guid];
@@ -266,11 +243,14 @@ IITC.filters.filterEntities = function () {
 };
 
 /**
+ * @memberof IITC.filters
  * @class FilterLayer
  * @description Layer abstraction to control with the layer chooser a filter.
  *              The filter is disabled on layer add, and enabled on layer remove.
  * @extends L.Layer
- * @param {{name: string, filter: FilterDesc}} options
+ * @param {Object} options - Configuration options for the filter layer
+ * @param {string} options.name - The name of the filter
+ * @param {IITC.filters.FilterDesc} options.filter - The filter description
  */
 IITC.filters.FilterLayer = L.Layer.extend({
   options: {
@@ -293,5 +273,3 @@ IITC.filters.FilterLayer = L.Layer.extend({
     IITC.filters.filterEntities();
   },
 });
-
-/* global IITC, L */