# add_user_list_attribute_values Add values to a list attribute for a user Agent View of the PolicyLayer registry record for `add_user_list_attribute_values`. HTML page: https://policylayer.com/tools/adbutler/add-user-list-attribute-values ## Facts - Tool: `add_user_list_attribute_values` - Server: AdButler (`adbutler/mcp-server`) — https://policylayer.com/tools/adbutler.md - Homepage: https://github.com/adbutler/mcp-server - Risk category: Write (Medium risk) - Registry record: grade F, identity unverified - Server rate-limited: no - Parameters: 4 (3 required) - Recommended policy verdict: Rate-limited ## Parameters | Parameter | Type | Required | Description | | --- | --- | --- | --- | | `values` | array | no | Values to add | | `user_id` | string | yes | User ID | | `user_db_id` | number | yes | User database ID | | `list_attribute_name` | string | yes | List attribute name | Parameters from the server's own tool schema. ## Example call (MCP tools/call, JSON-RPC 2.0) ```json { "jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": { "name": "add_user_list_attribute_values", "arguments": { "user_id": "", "user_db_id": 0, "list_attribute_name": "" } } } ``` ## Why add_user_list_attribute_values is rated Medium This tool modifies user attributes by adding values to a list, which is a write operation. It is reversible (values can be removed or corrected), so it is not Destructive. The severity is medium because modifying user attributes in an advertising platform could affect campaign targeting, billing, or user data integrity, but the blast radius is limited to individual user records rather than system-wide data. From the tool's own definition: "Tool description states 'Add values to a list attribute for a user' — this creates or modifies user data. The sibling tools include bulk upload operations and archive functions, indicating this server manages advertising campaign data." ## Use case AI agents use add_user_list_attribute_values to create or update resources in AdButler, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your AdButler environment. ## Recommended policy (PolicyLayer) Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches AdButler: ```json { "version": "1", "default": "deny", "tools": { "add_user_list_attribute_values": { "limits": [ { "counter": "add_user_list_attribute_values_rate", "window": "minute", "max": 30, "scope": "grant" } ] } } } ``` ## Other tools on AdButler (621) - `archive_advertiser` — Destructive — https://policylayer.com/tools/adbutler/archive-advertiser.md - `archive_channel` — Destructive — https://policylayer.com/tools/adbutler/archive-channel.md - `archive_contract` — Destructive — https://policylayer.com/tools/adbutler/archive-contract.md - `archive_email_zone` — Destructive — https://policylayer.com/tools/adbutler/archive-email-zone.md - `archive_publisher` — Destructive — https://policylayer.com/tools/adbutler/archive-publisher.md - `bulk_upload_remove_data_list` — Destructive — https://policylayer.com/tools/adbutler/bulk-upload-remove-data-list.md - `bulk_upload_replace_user_db` — Destructive — https://policylayer.com/tools/adbutler/bulk-upload-replace-user-db.md - `campaign_bulk_delete_catalog_ad_items` — Destructive — https://policylayer.com/tools/adbutler/campaign-bulk-delete-catalog-ad-items.md - `cancel_signature_request` — Destructive — https://policylayer.com/tools/adbutler/cancel-signature-request.md - `delete_advertiser` — Destructive — https://policylayer.com/tools/adbutler/delete-advertiser.md - `delete_archived_campaign` — Destructive — https://policylayer.com/tools/adbutler/delete-archived-campaign.md - `delete_archived_channel` — Destructive — https://policylayer.com/tools/adbutler/delete-archived-channel.md - `delete_archived_contract` — Destructive — https://policylayer.com/tools/adbutler/delete-archived-contract.md - `delete_audience` — Destructive — https://policylayer.com/tools/adbutler/delete-audience.md - `delete_audio_creative` — Destructive — https://policylayer.com/tools/adbutler/delete-audio-creative.md - `delete_beacon_signing_key` — Destructive — https://policylayer.com/tools/adbutler/delete-beacon-signing-key.md - `delete_bidder` — Destructive — https://policylayer.com/tools/adbutler/delete-bidder.md - `delete_campaign` — Destructive — https://policylayer.com/tools/adbutler/delete-campaign.md - `delete_campaign_assignment` — Destructive — https://policylayer.com/tools/adbutler/delete-campaign-assignment.md - `delete_catalog_ad_item` — Destructive — https://policylayer.com/tools/adbutler/delete-catalog-ad-item.md - `delete_catalog_zone` — Destructive — https://policylayer.com/tools/adbutler/delete-catalog-zone.md - `delete_channel` — Destructive — https://policylayer.com/tools/adbutler/delete-channel.md - `delete_channel_zone_assignment` — Destructive — https://policylayer.com/tools/adbutler/delete-channel-zone-assignment.md - `delete_contact` — Destructive — https://policylayer.com/tools/adbutler/delete-contact.md - `delete_contract` — Destructive — https://policylayer.com/tools/adbutler/delete-contract.md - `delete_contract_document` — Destructive — https://policylayer.com/tools/adbutler/delete-contract-document.md - `delete_contract_payment` — Destructive — https://policylayer.com/tools/adbutler/delete-contract-payment.md - `delete_contract_template` — Destructive — https://policylayer.com/tools/adbutler/delete-contract-template.md - `delete_creative` — Destructive — https://policylayer.com/tools/adbutler/delete-creative.md - `delete_custom_html_ad_item` — Destructive — https://policylayer.com/tools/adbutler/delete-custom-html-ad-item.md - …and 591 more: https://policylayer.com/tools/adbutler.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=adbutler · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/adbutler