Subscribes your app to receive webhook updates for a Facebook Page. Args: - page_id (string): Facebook Page ID - subscribed_fields (string[]): Fields to subscribe to, e.g., feed, messages, messaging_postbacks, conversations Call without subscribed_fields to check current subscriptions.
AI agents use meta_subscribe_page_webhooks to create or update resources in Meta MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Meta MCP Server environment.
This tool creates a webhook subscription, which is a reversible write operation. It registers the app to receive notifications for specified page events. Misuse could cause unwanted data flows or privacy exposure, but it's not destructive or financial in nature.
From the tool's definition Subscribes your app to receive webhook updates for a Facebook Page
Documented attack patterns abuse exactly the kind of access meta_subscribe_page_webhooks gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Meta MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for meta_subscribe_page_webhooks:
{
"version": "1",
"default": "deny",
"tools": {
"meta_subscribe_page_webhooks": {
"limits": [
{
"counter": "meta_subscribe_page_webhooks_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}meta_subscribe_page_webhooks 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.
Free to start. No card required.
Subscribes your app to receive webhook updates for a Facebook Page. Args: - page_id (string): Facebook Page ID - subscribed_fields (string[]): Fields to subscribe to, e.g., feed, messages, messaging_postbacks, conversations Call without subscribed_fields to check current subscriptions. It is categorised as a Write tool in the Meta MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Meta MCP Server MCP server in PolicyLayer and add a rule for meta_subscribe_page_webhooks: 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 MCP Server. Nothing to install.
meta_subscribe_page_webhooks 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 meta_subscribe_page_webhooks 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 meta_subscribe_page_webhooks. 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.
meta_subscribe_page_webhooks is provided by the Meta MCP Server MCP server (oliverames/meta-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Meta MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
200 Meta MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.