zernio_create_post
Create a new social media post. Provide platforms as an array of {platform, accountId} objects and media as mediaItems [{type, url}]. Use zernio_upload_media_from_file to get publicUrls for local files.
This record as markdown: /tools/eyalm321-zernio-mcp/zernio-create-post.md
What zernio_create_post does on Zernio
AI agents use zernio_create_post to create or update resources in Zernio, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Zernio environment.
Why zernio_create_post is rated Medium
This tool performs irreversible creation of content across social platforms, which constitutes a Write action with high severity. Once posted to social media, content propagation to followers is difficult to fully undo. The blast radius is high because an AI agent could maliciously or erroneously post inflammatory, spam, or harmful content to numerous accounts and platforms simultaneously.
From the tool's definition Tool creates new social media posts across multiple platforms and accounts. Description states 'Create a new social media post' with ability to specify platforms, accounts, and media attachments.
Attacks that exploit this kind of access
The rule that runs zernio_create_post safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Zernio, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For zernio_create_post, this is the rule to start with:
zernio_create_post 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 Zernio, apply this rule, and every zernio_create_post call is checked against it from then on.
Questions about zernio_create_post
Create a new social media post. Provide platforms as an array of {platform, accountId} objects and media as mediaItems [{type, url}]. Use zernio_upload_media_from_file to get publicUrls for local files. It is categorised as a Write tool in the Zernio MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Zernio MCP server in PolicyLayer and add a rule for zernio_create_post: 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 Zernio. Nothing to install.
zernio_create_post 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 zernio_create_post 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 zernio_create_post. 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.
zernio_create_post is provided by the Zernio MCP server (eyalm321/zernio-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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