# discord_list_reaction_users

List users for a specific reaction on a message

Agent View of the PolicyLayer registry record for `discord_list_reaction_users`. HTML page: https://policylayer.com/tools/arrrnmp-discord-mcp/discord-list-reaction-users

## Facts

- Tool: `discord_list_reaction_users`
- Server: Discord (`arrrnmp/discord-mcp`) — https://policylayer.com/tools/arrrnmp-discord-mcp.md
- Homepage: https://github.com/arrrnmp/discord-mcp
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

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

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

## Why discord_list_reaction_users is rated Low

This tool queries and retrieves information about which users have reacted to a message—a read-only operation with no capability to modify, delete, or execute actions. The data returned is already public within the Discord server context, making it low severity for potential misuse.

From the tool's own definition: "Tool name 'discord_list_reaction_users' and description 'List users for a specific reaction on a message' indicates data retrieval with no side effects."

## Use case

AI agents call discord_list_reaction_users to retrieve information from Discord without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Discord:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "discord_list_reaction_users": {}
  }
}
```

## Other tools on Discord (125)

- `discord_ban_member` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-ban-member.md
- `discord_begin_guild_prune` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-begin-guild-prune.md
- `discord_bulk_ban_members` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-bulk-ban-members.md
- `discord_clear_emoji_reactions` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-clear-emoji-reactions.md
- `discord_clear_reactions` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-clear-reactions.md
- `discord_delete_application_emoji` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-delete-application-emoji.md
- `discord_delete_automod_rule` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-delete-automod-rule.md
- `discord_delete_channel` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-delete-channel.md
- `discord_delete_channel_permission_overwrite` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-delete-channel-permission-overwrite.md
- `discord_delete_guild_emoji` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-delete-guild-emoji.md
- `discord_delete_guild_soundboard_sound` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-delete-guild-soundboard-sound.md
- `discord_delete_guild_sticker` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-delete-guild-sticker.md
- `discord_delete_guild_template` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-delete-guild-template.md
- `discord_delete_invite` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-delete-invite.md
- `discord_delete_message` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-delete-message.md
- `discord_delete_role` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-delete-role.md
- `discord_delete_scheduled_event` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-delete-scheduled-event.md
- `discord_delete_stage_instance` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-delete-stage-instance.md
- `discord_delete_thread` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-delete-thread.md
- `discord_delete_webhook` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-delete-webhook.md
- `discord_delete_webhook_message_by_token` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-delete-webhook-message-by-token.md
- `discord_kick_member` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-kick-member.md
- `discord_purge_messages` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-purge-messages.md
- `discord_remove_own_reaction` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-remove-own-reaction.md
- `discord_remove_thread_member` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-remove-thread-member.md
- `discord_remove_user_reaction` — Destructive — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-remove-user-reaction.md
- `discord_execute_webhook_by_token` — Execute — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-execute-webhook-by-token.md
- `discord_set_member_voice_state` — Execute — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-set-member-voice-state.md
- `discord_fetch_guild_ban` — Read — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-fetch-guild-ban.md
- `discord_fetch_member` — Read — https://policylayer.com/tools/arrrnmp-discord-mcp/discord-fetch-member.md
- …and 95 more: https://policylayer.com/tools/arrrnmp-discord-mcp.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`

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