diff --git a/Radicale.md b/Radicale.md
index 329acca..d8b8231 100644
--- a/Radicale.md
+++ b/Radicale.md
@@ -46,3 +46,50 @@ htpasswd_encryption = bcrypt
 [storage]
 filesystem_folder = /data/collections
 ```
+
+## Storage Layout
+
+Each user gets `/data/collections/collection-root/<user>/`. Inside, every calendar/addressbook is a directory named by a UUID with a `.Radicale.props` file (`displayname`, `tag` = `VCALENDAR` / `VADDRESSBOOK`, supported components, color). Events and tasks are individual `.ics` files; contacts are `.vcf`.
+
+## MCP Integration
+
+The `agap-mcp` server exposes Radicale over CalDAV using `RADICALE_PASSWORD` from Vaultwarden. Source: `~/agap_git/agap-mcp/src/radicale.js`. Tools (prefix `mcp__agap__`):
+
+| Tool | Purpose |
+|------|---------|
+| `radicale_list_calendars` | List calendars/addressbooks for a user (defaults to `alvis`) |
+| `radicale_list_events` | List events in a calendar (filename, uid, summary, dtstart, dtend) |
+| `radicale_get_event` | Get raw iCalendar text for one event |
+| `radicale_create_calendar` | MKCALENDAR with displayname, color, components |
+| `radicale_delete_calendar` | DELETE a calendar collection |
+| `radicale_put_event` | PUT an `.ics` (create or replace) |
+| `radicale_delete_event` | DELETE an event |
+| `radicale_move_event` | Copy event to another calendar, then delete from source |
+
+Env vars on the `agap-mcp` container:
+
+```yaml
+RADICALE_URL=http://localhost:5232
+RADICALE_USER=alvis
+```
+
+### Raw CalDAV (without MCP)
+
+```bash
+# List collections under alvis
+curl -u alvis:$RADICALE_PASSWORD -X PROPFIND \
+  -H 'Depth: 1' -H 'Content-Type: application/xml' \
+  http://localhost:5232/alvis/ --data '<?xml version="1.0"?>
+<d:propfind xmlns:d="DAV:"><d:prop><d:displayname/><d:resourcetype/></d:prop></d:propfind>'
+
+# Create a calendar
+curl -u alvis:$RADICALE_PASSWORD -X MKCALENDAR \
+  -H 'Content-Type: application/xml' \
+  http://localhost:5232/alvis/<uuid>/ --data '<?xml version="1.0"?>
+<c:mkcalendar xmlns:d="DAV:" xmlns:c="urn:ietf:params:xml:ns:caldav">
+  <d:set><d:prop>
+    <d:displayname>Social</d:displayname>
+    <c:supported-calendar-component-set><c:comp name="VEVENT"/></c:supported-calendar-component-set>
+  </d:prop></d:set>
+</c:mkcalendar>'
+```