reality_defender_generate_upload_url

WHAT IT DOES

What reality_defender_generate_upload_url does on Reality Defender MCP Server

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

WHY IT NEEDS A POLICY

Why reality_defender_generate_upload_url needs a policy

This tool generates upload URLs for subsequent file uploads to the Reality Defender API. URL generation is a write operation that creates temporary resources, though the operation itself is reversible and low-risk. However, confidence is reduced from 0.9 to 0.85 due to the empty tool description, which limits direct confirmation of exact functionality.

From the tool's definition Tool name contains 'generate_upload_url' indicating it creates temporary upload URLs for file submission. The server description mentions 'user file uploads' as a key capability, and upload URL generation is a prerequisite to file submission in API workflows.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

reality_defender_generate_upload_url Rate-limited

reality_defender_generate_upload_url 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": {
    "reality_defender_generate_upload_url": {
      "limits": [
        {
          "counter": "reality_defender_generate_upload_url_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 Reality Defender MCP Server, so you can run agents against it safely.

FAQ

Questions about reality_defender_generate_upload_url

What does the reality_defender_generate_upload_url tool do? +

reality_defender_generate_upload_url. It is categorised as a Write tool in the Reality Defender 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 reality_defender_generate_upload_url? +

Register the Reality Defender MCP Server MCP server in PolicyLayer and add a rule for reality_defender_generate_upload_url: 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 Reality Defender MCP Server. Nothing to install.

What risk level is reality_defender_generate_upload_url? +

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

Can I rate-limit reality_defender_generate_upload_url? +

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

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

reality_defender_generate_upload_url is provided by the Reality Defender MCP Server MCP server (reality-defender/eng-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.