upload_media · Strapi Content MCP: Risk & Policy

WHAT IT DOES

What upload_media does on Strapi Content MCP

AI agents use upload_media to create or update resources in Strapi Content MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Strapi Content MCP environment.

WHY IT NEEDS A POLICY

Why upload_media needs a policy

This tool creates new media objects in the Strapi CMS, which is a reversible Write operation. While it modifies the system state by adding files, uploads can be undone by deleting the uploaded media. The severity is medium because unintended uploads could consume storage and pollute the media library, but the impact is confined to media assets rather than critical business data.

From the tool's definition Tool description explicitly states 'This is a write operation' and enables uploading media files to the Strapi media library. The function adds new media content to the system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

upload_media Rate-limited

upload_media 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "upload_media": {
      "limits": [
        {
          "counter": "upload_media_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Strapi Content MCP, so you can run agents against it safely.

FAQ

Questions about upload_media

What does the upload_media tool do? +

Upload a media file from a URL to the Strapi media library. This is a write operation. It is categorised as a Write tool in the Strapi Content MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on upload_media? +

Register the Strapi Content MCP server in PolicyLayer and add a rule for upload_media: 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 Strapi Content MCP. Nothing to install.

What risk level is upload_media? +

upload_media is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit upload_media? +

Yes. Add a rate_limit block to the upload_media 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.

How do I block upload_media completely? +

Set action: deny in the PolicyLayer policy for upload_media. 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.

What MCP server provides upload_media? +

upload_media is provided by the Strapi Content MCP server (paulbratslavsky/strapi-content-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.