AI agents call discord_get_reactions to retrieve information from Discord without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries existing reaction data from Discord messages with no side effects, no data modification, and no execution of code or commands. It is purely informational, fitting the Read category definition of retrieving data without side effects. Severity is low because accessing this metadata poses minimal risk—reaction lists are typically visible in the Discord client itself.
From the tool's definition Tool description explicitly states 'List the users who reacted to a message with a specific emoji' and 'Read-only.' It returns reaction data (ids, usernames, bot flags) without modification.
Attacks that exploit this kind of access
List the users who reacted to a message with a specific emoji. Returns { reactions: [...] } with id, username, bot flag. Read-only. It is categorised as a Read tool in the Discord MCP Server, which means it retrieves data without modifying state.
Register the Discord MCP server in PolicyLayer and add a rule for discord_get_reactions: 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 Discord. Nothing to install.
discord_get_reactions is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the discord_get_reactions 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.
Set action: deny in the PolicyLayer policy for discord_get_reactions. 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.
discord_get_reactions is provided by the Discord MCP server (@pasympa/discord-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →