discord_create_emoji
Create a custom emoji (PNG, max size per Discord limits).
This record as markdown: /tools/bennettschwartz-discord-mcp/discord-create-emoji.md
What discord_create_emoji does on Discord MCP Server
AI agents use discord_create_emoji to create or update resources in Discord MCP Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Discord MCP Server environment.
Why discord_create_emoji is rated Medium
Creating a custom emoji is a reversible write operation that modifies Discord server configuration. It does not execute code, delete data, or involve financial transactions. However, the medium severity reflects that an AI agent with this capability could spam emoji creation, consuming server resources or cluttering the emoji list, though the impact is bounded and reversible (emojis can be deleted).
From the tool's definition Tool description states "Create a custom emoji", which is a create operation that modifies server state by adding a new emoji resource.
Attacks that exploit this kind of access
The rule that runs discord_create_emoji safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Discord MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For discord_create_emoji, this is the rule to start with:
discord_create_emoji 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.
The button opens the PolicyLayer dashboard: create your workspace, connect Discord MCP Server, apply this rule, and every discord_create_emoji call is checked against it from then on.
Questions about discord_create_emoji
Create a custom emoji (PNG, max size per Discord limits). It is categorised as a Write tool in the Discord MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Discord MCP Server MCP server in PolicyLayer and add a rule for discord_create_emoji: 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 MCP Server. Nothing to install.
discord_create_emoji is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the discord_create_emoji 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_create_emoji. 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_create_emoji is provided by the Discord MCP Server MCP server (bennettschwartz/discord-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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