upload_image_from_file · Basis MCP Server MCP: Risk & Policy

WHAT IT DOES

What upload_image_from_file does on Basis MCP Server

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

WHY IT NEEDS A POLICY

Why upload_image_from_file needs a policy

Uploading an image to IPFS/Pinata is a reversible write operation—it creates a new resource without modifying or deleting existing data. The blast radius is low because image uploads have minimal systemic impact on the blockchain or financial operations.

From the tool's definition Tool description states 'Upload a local image file to Basis (Pinata/IPFS)', indicating a create/store operation that adds data to a distributed storage system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

upload_image_from_file Rate-limited

upload_image_from_file 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_image_from_file": {
      "limits": [
        {
          "counter": "upload_image_from_file_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 Basis MCP Server, so you can run agents against it safely.

FAQ

Questions about upload_image_from_file

What does the upload_image_from_file tool do? +

Upload a local image file to Basis (Pinata/IPFS). For agents/Claude Code with local file access. It is categorised as a Write tool in the Basis MCP Server 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_image_from_file? +

Register the Basis MCP Server MCP server in PolicyLayer and add a rule for upload_image_from_file: 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 Basis MCP Server. Nothing to install.

What risk level is upload_image_from_file? +

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

Can I rate-limit upload_image_from_file? +

Yes. Add a rate_limit block to the upload_image_from_file 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_image_from_file completely? +

Set action: deny in the PolicyLayer policy for upload_image_from_file. 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_image_from_file? +

upload_image_from_file is provided by the Basis MCP Server MCP server (launch-on-basis/mcp-ts). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.