Sends a message from a Facebook Page to a user (in an existing conversation). Args: - page_id (string): Facebook Page ID - recipient_id (string): PSID (page-scoped user ID) of the recipient - message (string): Message text Requires pages_messaging permission. Only works within the 24-hour messagi...
AI agents use meta_send_page_message 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/writes new data (messages) reversibly but with significant reach—it directly contacts users on behalf of a Page, affecting user experience and potentially enabling spam, harassment, or misinformation campaigns. While messages can theoretically be deleted, the primary action is irreversible message creation at scale. The 24-hour window restriction limits but does not eliminate abuse potential.
From the tool's definition Sends a message from a Facebook Page to a user (in an existing conversation). This creates new message content that persists in the conversation thread.
Documented attack patterns abuse exactly the kind of access meta_send_page_message 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_send_page_message:
{
"version": "1",
"default": "deny",
"tools": {
"meta_send_page_message": {
"limits": [
{
"counter": "meta_send_page_message_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}meta_send_page_message 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.
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Sends a message from a Facebook Page to a user (in an existing conversation). Args: - page_id (string): Facebook Page ID - recipient_id (string): PSID (page-scoped user ID) of the recipient - message (string): Message text Requires pages_messaging permission. Only works within the 24-hour messaging window. 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_send_page_message: 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_send_page_message 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_send_page_message 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_send_page_message. 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_send_page_message 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.
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200 Meta MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.