This record as markdown: /tools/eyalm321-zernio-mcp/zernio-upload-media-direct.md
What zernio_upload_media_direct does on Zernio
AI agents use zernio_upload_media_direct 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_upload_media_direct is rated Medium
File uploads are Write operations as they create new resources in the system. Severity is medium because misuse could result in unauthorized content being stored (spam, malware, offensive material), but the operation is reversible (uploaded files can typically be deleted).
From the tool's definition Tool name explicitly states 'upload' and description confirms 'Upload a local file to Zernio' — a file upload operation that creates or stores media content.
Attacks that exploit this kind of access
The rule that runs zernio_upload_media_direct 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_upload_media_direct, this is the rule to start with:
zernio_upload_media_direct 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_upload_media_direct call is checked against it from then on.
Questions about zernio_upload_media_direct
Upload a local file to Zernio. 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_upload_media_direct: 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_upload_media_direct 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_upload_media_direct 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_upload_media_direct. 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_upload_media_direct 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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