object_upload · Zadara Storage MCP Server MCP: Risk & Policy

WHAT IT DOES

What object_upload does on Zadara Storage MCP Server

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

WHY IT NEEDS A POLICY

Why object_upload needs a policy

This tool creates or uploads objects to object storage, which is a reversible write operation (files can be deleted or overwritten later). It does not execute code, delete irreversibly, move money, or perform destructive operations. While it modifies storage state, the operation is not inherently permanent—objects can be removed via object_delete.

From the tool's definition Tool name 'object_upload' and description 'Upload an object to object storage' indicate the creation of new data or modification of existing storage resources through reversible file operations.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

object_upload Rate-limited

object_upload 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": {
    "object_upload": {
      "limits": [
        {
          "counter": "object_upload_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 Zadara Storage MCP Server, so you can run agents against it safely.

FAQ

Questions about object_upload

What does the object_upload tool do? +

Upload an object to object storage. Provide file content as base64-encoded string. It is categorised as a Write tool in the Zadara Storage 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 object_upload? +

Register the Zadara Storage MCP Server MCP server in PolicyLayer and add a rule for object_upload: 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 Zadara Storage MCP Server. Nothing to install.

What risk level is object_upload? +

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

Can I rate-limit object_upload? +

Yes. Add a rate_limit block to the object_upload 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 object_upload completely? +

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

object_upload is provided by the Zadara Storage MCP Server MCP server (zadarastorage/zadara-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.