# create_google_ads_performance_max_campaign Build a PERFORMANCE MAX campaign — Google’s cross-surface campaign type (Search, YouTube, Display, Discover, Gmail, Maps). ALWAYS created PAUSED; it spends NOTHING until you enable it with set_google_ads_status(confirm:true). PMax has NO manual bidding and NO keywords: it bids only on conversions, so the account MUST already have a conversion action — check with list_google_ads_conversion_actions, because this REFUSES rather than build a campaign that cannot optimise. Creative lives in an ASSET GROUP, and Google’s minimums are enforced before anything is sent: 3–15 headlines (≤30 chars), 1–5 longHeadlines (≤90), 2–5 descriptions (≤90), one businessName (≤25), at least one LOGO (1:1), one MARKETING_IMAGE (1.91:1) and one SQUARE_MARKETING_IMAGE (1:1) — upload the images with upload_google_ads_asset first and pass their asset resource names. A YouTube video is optional (Google generates one from the asset group if you omit it). Brand guidelines: since Google Ads API v21 they are ON by default for new PMax campaigns, which means the businessName and LOGO assets are linked to the CAMPAIGN (CampaignAsset), not to the asset group — Hermoso does that for you. Leave brandGuidelinesEnabled alone unless the user wants the older asset-group layout, and pass false for that. Budget, campaign, location/language targeting, the asset group and every asset link go up in ONE ATOMIC operation — if any part is rejected, nothing at all is created — and the whole tree is READ BACK from Google before you are told it exists. Print the returned note verbatim; if it says the campaign cannot serve, say that instead of calling it finished. RETAIL/SHOPPING: pass merchantCenterId (from list_merchant_accounts) to make it a Shopping-feed Performance Max — it then advertises the WHOLE feed (one root listing group); feedLabel narrows it to a single feed. Partitioning the feed by brand/category/custom label is NOT built and is refused by name, so a caller can never believe they narrowed it when they did not. Agent View of the PolicyLayer registry record for `create_google_ads_performance_max_campaign`. HTML page: https://policylayer.com/tools/hermoso/create-google-ads-performance-max-campaign ## Facts - Tool: `create_google_ads_performance_max_campaign` - Server: Hermoso (`https://app.hermoso.ai/mcp`) — https://policylayer.com/tools/hermoso.md - Homepage: git+https://github.com/hermoso-ai/hermoso.git - Risk category: Write (Medium risk) - Registry record: grade D, identity unverified - Server auth posture: gated - Server CORS policy: * - 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": "create_google_ads_performance_max_campaign", "arguments": {} } } ``` ## Why create_google_ads_performance_max_campaign is rated Medium An AI agent can call create_google_ads_performance_max_campaign faster than any human can review: one bad instruction and it creates or modifies resources in Hermoso by the hundred, each call as confident as the last. Risk signals: Admin/system-level operation ## Use case AI agents use create_google_ads_performance_max_campaign to create or update resources in Hermoso, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Hermoso environment. ## Recommended policy (PolicyLayer) Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Hermoso: ```json { "version": "1", "default": "deny", "tools": { "create_google_ads_performance_max_campaign": { "limits": [ { "counter": "create_google_ads_performance_max_campaign_rate", "window": "minute", "max": 30, "scope": "grant" } ] } } } ``` ## Other tools on Hermoso (895) - `answer_google_business_question` — Destructive — https://policylayer.com/tools/hermoso/answer-google-business-question.md - `apple_ads_change_history` — Destructive — https://policylayer.com/tools/hermoso/apple-ads-change-history.md - `associate_linkedin_conversion_campaigns` — Destructive — https://policylayer.com/tools/hermoso/associate-linkedin-conversion-campaigns.md - `cancel_openai_ads_audience_operation` — Destructive — https://policylayer.com/tools/hermoso/cancel-openai-ads-audience-operation.md - `cancel_scheduled` — Destructive — https://policylayer.com/tools/hermoso/cancel-scheduled.md - `cancel_stripe_subscription` — Destructive — https://policylayer.com/tools/hermoso/cancel-stripe-subscription.md - `clear_sheet_range` — Destructive — https://policylayer.com/tools/hermoso/clear-sheet-range.md - `create_analytics_custom_dimension` — Destructive — https://policylayer.com/tools/hermoso/create-analytics-custom-dimension.md - `create_openai_ads_campaign` — Destructive — https://policylayer.com/tools/hermoso/create-openai-ads-campaign.md - `delete_analytics_key_event` — Destructive — https://policylayer.com/tools/hermoso/delete-analytics-key-event.md - `delete_apple_ads_object` — Destructive — https://policylayer.com/tools/hermoso/delete-apple-ads-object.md - `delete_bluesky_post` — Destructive — https://policylayer.com/tools/hermoso/delete-bluesky-post.md - `delete_brand` — Destructive — https://policylayer.com/tools/hermoso/delete-brand.md - `delete_creator` — Destructive — https://policylayer.com/tools/hermoso/delete-creator.md - `delete_dm_automation` — Destructive — https://policylayer.com/tools/hermoso/delete-dm-automation.md - `delete_drive_file` — Destructive — https://policylayer.com/tools/hermoso/delete-drive-file.md - `delete_google_ads_object` — Destructive — https://policylayer.com/tools/hermoso/delete-google-ads-object.md - `delete_google_business_post` — Destructive — https://policylayer.com/tools/hermoso/delete-google-business-post.md - `delete_instagram_dm_automation` — Destructive — https://policylayer.com/tools/hermoso/delete-instagram-dm-automation.md - `delete_linkedin_ads_object` — Destructive — https://policylayer.com/tools/hermoso/delete-linkedin-ads-object.md - `delete_linkedin_comment` — Destructive — https://policylayer.com/tools/hermoso/delete-linkedin-comment.md - `delete_linkedin_lead_subscription` — Destructive — https://policylayer.com/tools/hermoso/delete-linkedin-lead-subscription.md - `delete_merchant_data_source` — Destructive — https://policylayer.com/tools/hermoso/delete-merchant-data-source.md - `delete_merchant_product` — Destructive — https://policylayer.com/tools/hermoso/delete-merchant-product.md - `delete_messenger_marketing_campaign` — Destructive — https://policylayer.com/tools/hermoso/delete-messenger-marketing-campaign.md - `delete_meta_audience` — Destructive — https://policylayer.com/tools/hermoso/delete-meta-audience.md - `delete_meta_catalog` — Destructive — https://policylayer.com/tools/hermoso/delete-meta-catalog.md - `delete_meta_object` — Destructive — https://policylayer.com/tools/hermoso/delete-meta-object.md - `delete_microsoft_ads_object` — Destructive — https://policylayer.com/tools/hermoso/delete-microsoft-ads-object.md - `delete_microsoft_merchant_product` — Destructive — https://policylayer.com/tools/hermoso/delete-microsoft-merchant-product.md - …and 865 more: https://policylayer.com/tools/hermoso.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=hermoso · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/hermoso