upload_snapchat_ads_creative

PUT A FINISHED HERMOSO RENDER ONTO THE SNAPCHAT AD ACCOUNT so an ad can point at it — the bridge between making an ad and running one, and create_snapchat_ads_ad has no other source for the creativeId it needs. Pass the public https url of a render; SNAPCHAT HAS NO UPLOAD-FROM-URL, so Hermoso fetches the bytes and posts them as multipart. This does TWO things in one call — it uploads the MEDIA and then builds the CREATIVE that wraps it — because a Snapchat ad points at a CREATIVE and never at a media id, and stopping after the upload leaves an asset nothing can use. A PUBLIC PROFILE IS MANDATORY: Snapchat has required profile_properties on every ad creative since 2024-02-26, so profileId is REQUIRED and a call without one is refused BEFORE any bytes move (which is what stops an orphan media row being left on the ad account for a creative that could never be created). Get one from list_snapchat_ads_profiles, or read it in Snapchat Ads Manager. headline is required too. COPY LIMITS ARE SHORT AND ENFORCED: headline max 34 characters, brandName max 32 — far shorter than Meta or Google, and over-long copy is REFUSED rather than truncated, because shipping words nobody wrote is worse than a refusal. To build a SECOND creative on media already uploaded, pass mediaId instead of url — nothing is downloaded or uploaded again. A file over 32MB is refused by name (Snapchat requires a chunked upload flow above that which Hermoso does not implement). Free. It is categorised as a Write tool in the Hermoso MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

Register the Hermoso MCP server in PolicyLayer and add a rule for upload_snapchat_ads_creative: 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 Hermoso. Nothing to install.

upload_snapchat_ads_creative is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Yes. Add a rate_limit block to the upload_snapchat_ads_creative 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 upload_snapchat_ads_creative. 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.

upload_snapchat_ads_creative is provided by the Hermoso MCP server (https://app.hermoso.ai/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.