artifact.begin_upload

Begin a sequential digest-declared worker output upload.

SERVERVisionmcp SOURCEjoshuahickscorp/visionmcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/visionmcp/artifact.begin-upload.md

WHAT IT DOES

What artifact.begin_upload does on Visionmcp

AI agents use artifact.begin_upload to create or update resources in Visionmcp, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Visionmcp environment.

RISK

Why artifact.begin_upload is rated Medium

The tool initiates an upload operation which modifies state by starting a file/artifact transfer process. This is reversible (uploads can be aborted, as evidenced by the sibling tool 'artifact.abort_upload'), so it falls under Write rather than Destructive.

From the tool's definition Tool name 'artifact.begin_upload' and description 'Begin a sequential digest-declared worker output upload' indicate the tool creates or initiates a data upload process.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs artifact.begin_upload safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Visionmcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For artifact.begin_upload, this is the rule to start with:

artifact.begin_upload Rate-limited

artifact.begin_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": {
    "artifact.begin_upload": {
      "limits": [
        {
          "counter": "artifact.begin_upload_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Visionmcp, apply this rule, and every artifact.begin_upload call is checked against it from then on.

FAQ

Questions about artifact.begin_upload

What does the artifact.begin_upload tool do? +

Begin a sequential digest-declared worker output upload. It is categorised as a Write tool in the Visionmcp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on artifact.begin_upload? +

Register the Vision MCP server in PolicyLayer and add a rule for artifact.begin_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 Visionmcp. Nothing to install.

What risk level is artifact.begin_upload? +

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

Can I rate-limit artifact.begin_upload? +

Yes. Add a rate_limit block to the artifact.begin_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 artifact.begin_upload completely? +

Set action: deny in the PolicyLayer policy for artifact.begin_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 artifact.begin_upload? +

artifact.begin_upload is provided by the Vision MCP server (joshuahickscorp/visionmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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Guides

Govern customer-ops agents →Argument validation →Scoped token →