upload-app · PGYER MCP Server MCP: Risk & Policy

WHAT IT DOES

What upload-app does on PGYER MCP Server

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

WHY IT NEEDS A POLICY

Why upload-app needs a policy

The tool creates or stores new app artifacts on the PGYER platform, which is a Write category action. Severity is medium because uploading an app could have downstream consequences if malicious code is deployed, but the tool itself is reversible and doesn't directly move money or destroy data. Confidence is high because the functionality is explicit in the name and description.

From the tool's definition Tool name 'upload-app' and description 'Upload app to PGYER' indicate creation and storage of app binaries on the platform. This is a reversible write operation (apps can be deleted/replaced).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

upload-app Rate-limited

upload-app 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-app": {
      "limits": [
        {
          "counter": "upload-app_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 PGYER MCP Server, so you can run agents against it safely.

FAQ

Questions about upload-app

What does the upload-app tool do? +

Upload app to PGYER. It is categorised as a Write tool in the PGYER 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-app? +

Register the PGYER MCP Server MCP server in PolicyLayer and add a rule for upload-app: 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 PGYER MCP Server. Nothing to install.

What risk level is upload-app? +

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

Can I rate-limit upload-app? +

Yes. Add a rate_limit block to the upload-app 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-app completely? +

Set action: deny in the PolicyLayer policy for upload-app. 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-app? +

upload-app is provided by the PGYER MCP Server MCP server (pgyer/pgyer-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.