chatMediaUploadAppend · Xdevplatform/x MCP: Risk & Policy

WHAT IT DOES

What chatMediaUploadAppend does on Xdevplatform/xmcp

AI agents use chatMediaUploadAppend to create or update resources in Xdevplatform/xmcp — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Xdevplatform/xmcp environment.

WHY IT NEEDS A POLICY

Why chatMediaUploadAppend needs a policy

This tool appends data to an existing upload, which is a reversible write operation. It modifies state by adding to an in-progress media file but does not execute arbitrary code, delete data, or move money. The severity is medium because uncontrolled media uploads could exhaust storage or introduce unwanted content, but the operation itself is not irreversible or immediately destructive.

From the tool's definition Tool name 'chatMediaUploadAppend' and description 'Append data chunks to an in-progress chat media upload' indicate modification of data in an upload stream.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

chatMediaUploadAppend Rate-limited

chatMediaUploadAppend 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": {
    "chatMediaUploadAppend": {
      "limits": [
        {
          "counter": "chatmediauploadappend_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 Xdevplatform/xmcp, so you can run agents against it safely.

FAQ

Questions about chatMediaUploadAppend

What does the chatMediaUploadAppend tool do? +

Append data chunks to an in-progress chat media upload. It is categorised as a Write tool in the Xdevplatform/xmcp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on chatMediaUploadAppend? +

Register the Xdevplatform/x MCP server in PolicyLayer and add a rule for chatMediaUploadAppend: 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 Xdevplatform/xmcp. Nothing to install.

What risk level is chatMediaUploadAppend? +

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

Can I rate-limit chatMediaUploadAppend? +

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

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

chatMediaUploadAppend is provided by the Xdevplatform/x MCP server (xdevplatform/xmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.