Upload a media file to the Strapi Media Library. Maximum size: ~750KB file (1MB base64). For larger files, use upload_media_from_path.
AI agents use upload_media to create or update resources in Strapi MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Strapi MCP Server environment.
This tool creates new media assets in the CMS library, modifying the content store reversibly. It is Write rather than Execute because it is a straightforward upload operation with predictable side effects (file addition), not arbitrary code/command execution. It is not Destructive because uploads can be undone by deletion.
From the tool's definition Tool description states 'Upload a media file to the Strapi Media Library,' which is a create/write operation that adds new data (media files) to the system.
Documented attack patterns abuse exactly the kind of access upload_media gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Strapi MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for upload_media:
{
"version": "1",
"default": "deny",
"tools": {
"upload_media": {
"limits": [
{
"counter": "upload_media_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}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.
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Upload a media file to the Strapi Media Library. Maximum size: ~750KB file (1MB base64). For larger files, use upload_media_from_path. It is categorised as a Write tool in the Strapi MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Strapi MCP Server 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 MCP Server. Nothing to install.
upload_media 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 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.
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.
upload_media is provided by the Strapi MCP Server MCP server (l33tdawg/strapi-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Strapi MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
20 Strapi MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.