Generate HTML preview of how an ad creative will appear in different placements and formats. Useful for testing creative appearance before launching campaigns.
AI agents call preview_ad to retrieve information from Meta Marketing API MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The preview_ad tool retrieves and renders a representation of how an ad will look across different placements. It does not create, modify, delete, or execute any changes to actual advertising campaigns, accounts, or financial commitments. It is purely informational—generating a client-side preview for inspection purposes. No data is permanently altered, no campaigns are launched, and no financial transactions occur.
From the tool's definition Tool description states 'Generate HTML preview' and 'testing creative appearance before launching campaigns' — this is a visualization/preview operation with no side effects on actual ads, campaigns, or data.
Attacks that exploit this kind of access
Generate HTML preview of how an ad creative will appear in different placements and formats. Useful for testing creative appearance before launching campaigns. It is categorised as a Read tool in the Meta Marketing API MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Meta Marketing API MCP Server MCP server in PolicyLayer and add a rule for preview_ad: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Meta Marketing API MCP Server. Nothing to install.
preview_ad is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the preview_ad rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for preview_ad. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
preview_ad is provided by the Meta Marketing API MCP Server MCP server (pythonando/meta-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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