POST body should contain raw binary media file
AI agents use postmediabyfilename to create or update resources in Revel Digital MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Revel Digital MCP Server environment.
This tool uploads a binary media file to the digital signage system. It creates new content (Write category), not destructive/irreversible. However, severity is high because arbitrary binary file uploads could introduce malicious content into the digital signage infrastructure, affecting public-facing displays at scale.
From the tool's definition POST body should contain raw binary media file
Attacks that exploit this kind of access
POST body should contain raw binary media file. It is categorised as a Write tool in the Revel Digital MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Revel Digital MCP Server MCP server in PolicyLayer and add a rule for postmediabyfilename: 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 Revel Digital MCP Server. Nothing to install.
postmediabyfilename 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 postmediabyfilename 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 postmediabyfilename. 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.
postmediabyfilename is provided by the Revel Digital MCP Server MCP server (reveldigital/reveldigital-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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