docs: update all MCP documentation for 22 tools + API key auth

- Rewrite mcp-server/README.md: clean structure, auth section, 22 tools
- Rewrite N8N-CONFIG.md: remove hardcoded IPs, add x-api-key auth flow
- Rewrite N8N-WORKFLOWS.md: simplified, removed AI proxy tool references
- Update README.md/README.fr.md: 37→22 tools, add auth mention
- Update GUIDE.md/GUIDE.en.md: remove AI/API key tool tables, add auth
- Update DEPLOY.md: SSE → Streamable HTTP in architecture diagram

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

GUIDE.en.md

@@ -51,7 +51,7 @@
 **Advanced tools:**
 - **Canvas/Lab** - whiteboard with drawing (Excalidraw)
 - **RSS feeds** - RSS feed integration
-- **MCP Server** - 37 tools to integrate with Claude Desktop, N8N, or any MCP client
+- **MCP Server** - 22 tools to integrate with Claude Desktop, N8N, or any MCP client
 
 **Administration:**
 - **Authentication** via NextAuth.js v5 (credentials, registration, password reset)
@@ -107,10 +107,10 @@ Momento/
 │   ├── Dockerfile               # Multi-stage build (node:22-bullseye-slim)
 │   ├── docker-compose.yml       # Standalone (postgres + app)
 │   └── .env.example             # Local dev template
-├── mcp-server/                  # MCP Server (37 tools)
+├── mcp-server/                  # MCP Server (22 tools)
 │   ├── index.js                 # stdio mode (Claude Desktop)
 │   ├── index-sse.js             # HTTP Streamable mode (N8N, remote)
-│   ├── tools.js                 # Definitions of the 37 MCP tools
+│   ├── tools.js                 # Definitions of the 22 MCP tools
 │   ├── auth.js                  # API key authentication
 │   ├── Dockerfile               # MCP container (node:20-alpine)
 │   └── .env.example             # MCP template
@@ -433,9 +433,9 @@ Agents are also available in **AI Chat**: when web search is enabled, the chat a
 
 The MCP server (Model Context Protocol, v3.1) allows AI agents to interact with your notes via a standardized protocol.
 
-### Available Tools (37 tools)
+### Available Tools (22 tools)
 
-**Notes (12):**
+**Notes (11):**
 
 | Tool | Description |
 |------|-------------|
@@ -444,7 +444,6 @@ The MCP server (Model Context Protocol, v3.1) allows AI agents to interact with
 | `get_note` | Retrieve a specific note |
 | `update_note` | Modify an existing note |
 | `delete_note` | Delete a note |
-| `delete_all_notes` | Delete all notes |
 | `search_notes` | Search notes by content |
 | `move_note` | Move a note to a notebook |
 | `toggle_pin` | Pin/Unpin a note |
@@ -472,36 +471,12 @@ The MCP server (Model Context Protocol, v3.1) allows AI agents to interact with
 | `update_label` | Modify a label |
 | `delete_label` | Delete a label |
 
-**AI (11):**
-
-| Tool | Description |
-|------|-------------|
-| `generate_title_suggestions` | Title suggestions for a note |
-| `reformulate_text` | Reformulate text |
-| `generate_tags` | Generate tags for a note |
-| `suggest_notebook` | Suggest a notebook for a note |
-| `get_notebook_summary` | Notebook summary |
-| `get_memory_echo` | Memory echo - connections between notes |
-| `get_note_connections` | Connections of a note |
-| `dismiss_connection` | Dismiss a connection |
-| `fuse_notes` | Merge notes |
-| `batch_organize` | Automatic batch organization |
-| `suggest_auto_labels` | Suggest automatic labels |
-
 **Reminders (1):**
 
 | Tool | Description |
 |------|-------------|
 | `get_due_reminders` | Retrieve due reminders |
 
-**API Key Management (3):**
-
-| Tool | Description |
-|------|-------------|
-| `generate_api_key` | Generate an API key |
-| `list_api_keys` | List API keys |
-| `revoke_api_key` | Revoke an API key |
-
 ### stdio Mode (Claude Desktop, Cline)
 
 Communication via stdin/stdout, ideal for local clients.
@@ -520,15 +495,17 @@ Communication via stdin/stdout, ideal for local clients.
 
 ### HTTP Streamable Mode (N8N, Remote)
 
-Communication via HTTP Streamable (replaces the legacy SSE), accessible over the network.
+Communication via HTTP Streamable, accessible over the network. API key authentication is enabled by default in Docker.
+
+API keys are generated from **Settings > MCP** in the Memento web UI.
 
 ```bash
-# .env.docker
-MCP_MODE="sse"
-MCP_PORT="3001"
+# docker-compose.yml (pre-configured)
+MCP_MODE=sse
+MCP_REQUIRE_AUTH=true
 ```
 
-The server will be accessible at `http://localhost:3001`.
+The server will be accessible at `http://localhost:3001/mcp`.
 
 #### HTTP Endpoints
 
@@ -552,8 +529,7 @@ curl http://localhost:3001/
 # .env.docker
 MCP_LOG_LEVEL=info          # debug, info, warn, error
 MCP_REQUEST_TIMEOUT=30000   # Timeout in ms
-MCP_REQUIRE_AUTH=false      # Enable authentication
-MCP_API_KEY="your-key"      # API key if auth is enabled
+MCP_REQUIRE_AUTH=true       # API key authentication
 APP_BASE_URL="http://localhost:3000"  # App URL for links
 ```
 
@@ -566,6 +542,7 @@ APP_BASE_URL="http://localhost:3000"  # App URL for links
 1. Add an **"MCP Client"** node in N8N
 2. Select **"HTTP Streamable"** as transport
 3. Configure the endpoint: `http://memento-mcp:3001/mcp` (Docker) or `http://YOUR_IP:3001/mcp`
+4. Add **Header Auth**: `x-api-key` = your API key (generated from Settings > MCP)
 
 ### Pre-configured Workflows