# chatMediaUploadAppend

Append data chunks to an in-progress chat media upload.

Agent View of the PolicyLayer registry record for `chatMediaUploadAppend`. HTML page: https://policylayer.com/tools/xdevplatform-xmcp/chatmediauploadappend

## Facts

- Tool: `chatMediaUploadAppend`
- Server: Xdevplatform/xmcp (`xdevplatform/xmcp`) — https://policylayer.com/tools/xdevplatform-xmcp.md
- Homepage: https://github.com/xdevplatform/xmcp
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "chatMediaUploadAppend",
    "arguments": {}
  }
}
```

## Why chatMediaUploadAppend is rated Medium

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 own definition: "Tool name 'chatMediaUploadAppend' and description 'Append data chunks to an in-progress chat media upload' indicate modification of data in an upload stream."

## Use case

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.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Xdevplatform/xmcp:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "chatMediaUploadAppend": {
      "limits": [
        {
          "counter": "chatmediauploadappend_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Xdevplatform/xmcp (134)

- `deleteAccountActivitySubscription` — Destructive — https://policylayer.com/tools/xdevplatform-xmcp/deleteaccountactivitysubscription.md
- `deleteActivitySubscription` — Destructive — https://policylayer.com/tools/xdevplatform-xmcp/deleteactivitysubscription.md
- `deleteAllConnections` — Destructive — https://policylayer.com/tools/xdevplatform-xmcp/deleteallconnections.md
- `deleteCommunityNotes` — Destructive — https://policylayer.com/tools/xdevplatform-xmcp/deletecommunitynotes.md
- `deleteConnectionsByEndpoint` — Destructive — https://policylayer.com/tools/xdevplatform-xmcp/deleteconnectionsbyendpoint.md
- `deleteConnectionsByUuids` — Destructive — https://policylayer.com/tools/xdevplatform-xmcp/deleteconnectionsbyuuids.md
- `deleteDirectMessagesEvents` — Destructive — https://policylayer.com/tools/xdevplatform-xmcp/deletedirectmessagesevents.md
- `deleteLists` — Destructive — https://policylayer.com/tools/xdevplatform-xmcp/deletelists.md
- `deleteMediaSubtitles` — Destructive — https://policylayer.com/tools/xdevplatform-xmcp/deletemediasubtitles.md
- `deletePosts` — Destructive — https://policylayer.com/tools/xdevplatform-xmcp/deleteposts.md
- `deleteUsersBookmark` — Destructive — https://policylayer.com/tools/xdevplatform-xmcp/deleteusersbookmark.md
- `removeListsMemberByUserId` — Destructive — https://policylayer.com/tools/xdevplatform-xmcp/removelistsmemberbyuserid.md
- `createComplianceJobs` — Execute — https://policylayer.com/tools/xdevplatform-xmcp/createcompliancejobs.md
- `sendChatTypingIndicator` — Execute — https://policylayer.com/tools/xdevplatform-xmcp/sendchattypingindicator.md
- `chatMediaDownload` — Read — https://policylayer.com/tools/xdevplatform-xmcp/chatmediadownload.md
- `dmConversationsMediaDownload` — Read — https://policylayer.com/tools/xdevplatform-xmcp/dmconversationsmediadownload.md
- `getAccountActivitySubscriptionCount` — Read — https://policylayer.com/tools/xdevplatform-xmcp/getaccountactivitysubscriptioncount.md
- `getAccountActivitySubscriptions` — Read — https://policylayer.com/tools/xdevplatform-xmcp/getaccountactivitysubscriptions.md
- `getActivitySubscriptions` — Read — https://policylayer.com/tools/xdevplatform-xmcp/getactivitysubscriptions.md
- `getChatConversation` — Read — https://policylayer.com/tools/xdevplatform-xmcp/getchatconversation.md
- `getChatConversations` — Read — https://policylayer.com/tools/xdevplatform-xmcp/getchatconversations.md
- `getCommunitiesById` — Read — https://policylayer.com/tools/xdevplatform-xmcp/getcommunitiesbyid.md
- `getComplianceJobs` — Read — https://policylayer.com/tools/xdevplatform-xmcp/getcompliancejobs.md
- `getComplianceJobsById` — Read — https://policylayer.com/tools/xdevplatform-xmcp/getcompliancejobsbyid.md
- `getConnectionHistory` — Read — https://policylayer.com/tools/xdevplatform-xmcp/getconnectionhistory.md
- `getDirectMessagesEvents` — Read — https://policylayer.com/tools/xdevplatform-xmcp/getdirectmessagesevents.md
- `getDirectMessagesEventsByConversationId` — Read — https://policylayer.com/tools/xdevplatform-xmcp/getdirectmessageseventsbyconversationid.md
- `getDirectMessagesEventsById` — Read — https://policylayer.com/tools/xdevplatform-xmcp/getdirectmessageseventsbyid.md
- `getDirectMessagesEventsByParticipantId` — Read — https://policylayer.com/tools/xdevplatform-xmcp/getdirectmessageseventsbyparticipantid.md
- `getInsights28Hr` — Read — https://policylayer.com/tools/xdevplatform-xmcp/getinsights28hr.md
- …and 104 more: https://policylayer.com/tools/xdevplatform-xmcp.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=xdevplatform-xmcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/xdevplatform-xmcp