feat: add marketing tools registry for agent discovery

Create centralized tools/ directory with REGISTRY.md index and 29
integration guides covering analytics, SEO, CRM, payments, referral,
email, ads, automation, and commerce platforms.

Each guide includes API endpoints, authentication, common operations,
and links to relevant skills. Updated AGENTS.md and key skills
(referral-program, analytics-tracking, email-sequence, paid-ads)
with tool integration references.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tools/integrations/tiktok-ads.md

@@ -0,0 +1,161 @@
+# TikTok Ads
+
+Advertising platform for TikTok's short-form video audience.
+
+## Capabilities
+
+| Integration | Available | Notes |
+|-------------|-----------|-------|
+| API | ✓ | Marketing API for campaigns, audiences, reporting |
+| MCP | - | Not available |
+| CLI | - | Not available |
+| SDK | ✓ | Python SDK available |
+
+## Authentication
+
+- **Type**: Access Token
+- **Header**: `Access-Token: {access_token}`
+- **Setup**: Create app in TikTok for Business, get access token
+
+## Common Agent Operations
+
+### Get advertiser info
+
+```bash
+GET https://business-api.tiktok.com/open_api/v1.3/advertiser/info/?advertiser_ids=["{advertiser_id}"]
+
+Access-Token: {access_token}
+```
+
+### Get campaigns
+
+```bash
+GET https://business-api.tiktok.com/open_api/v1.3/campaign/get/?advertiser_id={advertiser_id}&page=1&page_size=20
+
+Access-Token: {access_token}
+```
+
+### Get campaign report
+
+```bash
+POST https://business-api.tiktok.com/open_api/v1.3/report/integrated/get/
+
+Access-Token: {access_token}
+
+{
+  "advertiser_id": "{advertiser_id}",
+  "report_type": "BASIC",
+  "dimensions": ["campaign_id"],
+  "metrics": ["spend", "impressions", "clicks", "conversion"],
+  "data_level": "AUCTION_CAMPAIGN",
+  "start_date": "2024-01-01",
+  "end_date": "2024-01-31"
+}
+```
+
+### Create campaign
+
+```bash
+POST https://business-api.tiktok.com/open_api/v1.3/campaign/create/
+
+Access-Token: {access_token}
+
+{
+  "advertiser_id": "{advertiser_id}",
+  "campaign_name": "Campaign Name",
+  "objective_type": "CONVERSIONS",
+  "budget_mode": "BUDGET_MODE_DAY",
+  "budget": 100
+}
+```
+
+### Update campaign status
+
+```bash
+POST https://business-api.tiktok.com/open_api/v1.3/campaign/status/update/
+
+Access-Token: {access_token}
+
+{
+  "advertiser_id": "{advertiser_id}",
+  "campaign_ids": ["{campaign_id}"],
+  "opt_status": "ENABLE"
+}
+```
+
+### Get ad groups
+
+```bash
+GET https://business-api.tiktok.com/open_api/v1.3/adgroup/get/?advertiser_id={advertiser_id}&campaign_ids=["{campaign_id}"]
+
+Access-Token: {access_token}
+```
+
+### Get audiences
+
+```bash
+GET https://business-api.tiktok.com/open_api/v1.3/dmp/custom_audience/list/?advertiser_id={advertiser_id}
+
+Access-Token: {access_token}
+```
+
+## Key Metrics
+
+| Metric | Description |
+|--------|-------------|
+| `spend` | Amount spent |
+| `impressions` | Ad impressions |
+| `clicks` | Clicks |
+| `ctr` | Click-through rate |
+| `cpc` | Cost per click |
+| `cpm` | Cost per 1000 impressions |
+| `conversion` | Conversions |
+| `cost_per_conversion` | CPA |
+| `video_play_actions` | Video views |
+| `video_watched_6s` | 6s views |
+
+## Campaign Objectives
+
+- `REACH` - Brand awareness
+- `TRAFFIC` - Website traffic
+- `VIDEO_VIEWS` - Video views
+- `LEAD_GENERATION` - Lead forms
+- `CONVERSIONS` - Website conversions
+- `APP_PROMOTION` - App installs
+
+## Targeting Options
+
+### Demographics
+- Age ranges
+- Gender
+- Languages
+- Locations
+
+### Interests & Behavior
+- Interest categories
+- Video interactions
+- Creator interactions
+- Hashtag interactions
+
+### Custom Audiences
+- Customer file uploads
+- Website visitors (pixel)
+- App activity
+- Engagement audiences
+
+## When to Use
+
+- Reaching younger demographics (18-34)
+- Video-first advertising
+- Viral/creative campaigns
+- App promotion
+
+## Rate Limits
+
+- 10 requests/second
+- 100,000 requests/day
+
+## Relevant Skills
+
+- paid-ads
+- analytics-tracking