# merge_units

Merge one unit into another (consolidate duplicates).

Agent View of the PolicyLayer registry record for `merge_units`. HTML page: https://policylayer.com/tools/nikopol666-mealie-mcp/merge-units

## Facts

- Tool: `merge_units`
- Server: Mealie MCP Server (`nikopol666/mealie-mcp`) — https://policylayer.com/tools/nikopol666-mealie-mcp.md
- Homepage: https://github.com/nikopol666/mealie-mcp
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "merge_units",
    "arguments": {}
  }
}
```

## Why merge_units is rated Medium

Merging units modifies the data structure by combining units but remains reversible through subsequent operations. This is a write operation that alters configuration data (units), but the blast radius is limited to the recipe system's unit taxonomy and does not cause financial harm, irreversible deletion, or code execution.

From the tool's own definition: "Tool description states 'Merge one unit into another (consolidate duplicates)' which modifies existing unit data by consolidating them into a single unit."

## Use case

AI agents use merge_units to create or update resources in Mealie MCP Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mealie MCP Server environment.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Mealie MCP Server:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "merge_units": {
      "limits": [
        {
          "counter": "merge_units_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Mealie MCP Server (242)

- `bulk_delete_recipes` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/bulk-delete-recipes.md
- `delete_admin_backup` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-admin-backup.md
- `delete_admin_group` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-admin-group.md
- `delete_admin_household` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-admin-household.md
- `delete_admin_user` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-admin-user.md
- `delete_category` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-category.md
- `delete_comment` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-comment.md
- `delete_cookbook` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-cookbook.md
- `delete_food` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-food.md
- `delete_group_label` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-group-label.md
- `delete_group_report` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-group-report.md
- `delete_household_notification` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-household-notification.md
- `delete_household_webhook` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-household-webhook.md
- `delete_meal_plan_entry` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-meal-plan-entry.md
- `delete_meal_plan_rule` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-meal-plan-rule.md
- `delete_recipe` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-recipe.md
- `delete_recipe_action` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-recipe-action.md
- `delete_recipe_image` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-recipe-image.md
- `delete_recipe_timeline_event` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-recipe-timeline-event.md
- `delete_recipe_tool` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-recipe-tool.md
- `delete_shared_recipe_record` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-shared-recipe-record.md
- `delete_shopping_item` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-shopping-item.md
- `delete_shopping_items` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-shopping-items.md
- `delete_shopping_list` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-shopping-list.md
- `delete_tag` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-tag.md
- `delete_unit` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-unit.md
- `delete_user_api_token` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-user-api-token.md
- `delete_user_favorite` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/delete-user-favorite.md
- `purge_recipe_exports` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/purge-recipe-exports.md
- `remove_recipe_from_shopping_list` — Destructive — https://policylayer.com/tools/nikopol666-mealie-mcp/remove-recipe-from-shopping-list.md
- …and 212 more: https://policylayer.com/tools/nikopol666-mealie-mcp.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=nikopol666-mealie-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/nikopol666-mealie-mcp