post_to_google_business
Publish a Post to the brand’s Google Business Profile — the panel that appears on Google Search and Maps for the business. Text, optionally ONE PHOTO, and a call-to-action button. Google’s Posts API accepts NO VIDEO, so pass a still image. This PUBLISHES immediately and publicly on the business l...
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What post_to_google_business does on Hermoso
AI agents use post_to_google_business 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.
Why post_to_google_business is rated Medium
An AI agent can call post_to_google_business 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.
Attacks that exploit this kind of access
The rule that runs post_to_google_business safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Hermoso, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For post_to_google_business, this is the rule to start with:
post_to_google_business 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.
The button opens the PolicyLayer dashboard: create your workspace, connect Hermoso, apply this rule, and every post_to_google_business call is checked against it from then on.
Questions about post_to_google_business
Publish a Post to the brand’s Google Business Profile — the panel that appears on Google Search and Maps for the business. Text, optionally ONE PHOTO, and a call-to-action button. Google’s Posts API accepts NO VIDEO, so pass a still image. This PUBLISHES immediately and publicly on the business listing — show the user the exact text, photo and button and get an explicit yes BEFORE calling. If the account manages several listings, call list_business_locations first and pass locationId. EVENT and OFFER posts both REQUIRE a title and a start date (Google’s rule). On an OFFER, Google IGNORES the button’s link — pass redeemOnlineUrl instead. A CALL button dials the number on the listing and takes no link. Needs Google Business Profile connected (Settings > Connectors > Google Business Profile). 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 post_to_google_business: 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.
post_to_google_business 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 post_to_google_business 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 post_to_google_business. 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.
post_to_google_business 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.
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