add_google_business_media · Posterly MCP: Risk & Policy

WHAT IT DOES

What add_google_business_media does on Posterly

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

WHY IT NEEDS A POLICY

Why add_google_business_media needs a policy

The tool creates or modifies data (adds media to a gallery) rather than deleting it, making it Write rather than Destructive. The severity is high because modifying a Google Business Profile's public-facing media could impact business reputation and customer perception if an AI agent adds inappropriate content without proper oversight. The explicit confirmation requirement demonstrates sensitivity of this operation.

From the tool's definition Tool description explicitly states "Add a photo or video to a Google Business Profile gallery" and requires user confirmation before modification with "confirm=true".

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_google_business_media Rate-limited

add_google_business_media stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "add_google_business_media": {
      "limits": [
        {
          "counter": "add_google_business_media_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Posterly, so you can run agents against it safely.

FAQ

Questions about add_google_business_media

What does the add_google_business_media tool do? +

Add a photo or video to a Google Business Profile gallery (the media shown on Maps and Search). Provide a public https source_url first by uploading via upload_media_from_url or upload_media. COVER and PROFILE are single-slot and replace the existing one. WRITE: show the location, category, and media URL to the user, then pass confirm=true only after explicit confirmation. It is categorised as a Write tool in the Posterly MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_google_business_media? +

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

What risk level is add_google_business_media? +

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

Can I rate-limit add_google_business_media? +

Yes. Add a rate_limit block to the add_google_business_media 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.

How do I block add_google_business_media completely? +

Set action: deny in the PolicyLayer policy for add_google_business_media. 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.

What MCP server provides add_google_business_media? +

add_google_business_media is provided by the Posterly MCP server (posterly-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.