Publishes a story (photo or video) to a Facebook Page. Requires: meta_list_pages called first to load page tokens. Args: - page_id (string): Facebook Page ID - media_url (string): Public URL of the image or video - media_type (enum):
AI agents use meta_publish_page_story 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 and posts content to a business platform, making it a Write operation. Severity is high because an AI agent misusing this tool could spam content, post inappropriate material to a business page without authorization, damage brand reputation, or violate platform policies. The blast radius extends to all followers of the page and Meta's wider ecosystem.
From the tool's definition The tool 'meta_publish_page_story' publishes content (photo or video) to a Facebook Page, which modifies the state of that page by adding new publicly visible content.
Documented attack patterns abuse exactly the kind of access meta_publish_page_story 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_publish_page_story:
{
"version": "1",
"default": "deny",
"tools": {
"meta_publish_page_story": {
"limits": [
{
"counter": "meta_publish_page_story_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}meta_publish_page_story 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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Publishes a story (photo or video) to a Facebook Page. Requires: meta_list_pages called first to load page tokens. Args: - page_id (string): Facebook Page ID - media_url (string): Public URL of the image or video - media_type (enum):. 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_publish_page_story: 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_publish_page_story 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_publish_page_story 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_publish_page_story. 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_publish_page_story 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.