Send a rich embed message to a channel. IMPORTANT: Before calling this tool, use list_channels to find the exact channel name, then use that exact name so the user sees exactly where the embed will go.
AI agents use send_embed to create or update resources in Discord — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Discord environment.
send_embed creates new message content (an embed) in a channel, which is a reversible Write operation. It does not execute arbitrary code (Execute), delete data (Destructive), or move money (Financial). The severity is medium because misuse could spam a channel or disrupt server communication, but the effect is reversible by deleting the message.
From the tool's definition Tool description: 'Send a rich embed message to a channel' — the verb 'send' indicates creating/posting new content to Discord. The sibling tools (add_reaction, assign_role, ban_member, bulk_delete_messages) and server description ('managing a Discord server..
Documented attack patterns abuse exactly the kind of access send_embed gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Discord, and nothing reaches the server without passing your rules. This is the rule we recommend for send_embed:
{
"version": "1",
"default": "deny",
"tools": {
"send_embed": {
"limits": [
{
"counter": "send_embed_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}send_embed 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.
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Send a rich embed message to a channel. IMPORTANT: Before calling this tool, use list_channels to find the exact channel name, then use that exact name so the user sees exactly where the embed will go. It is categorised as a Write tool in the Discord MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Discord MCP server in PolicyLayer and add a rule for send_embed: 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.
send_embed 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 send_embed 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 send_embed. 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.
send_embed is provided by the Discord MCP server (hardheadhackerhead/discord-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Discord, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
139 Discord tools catalogued and risk-classified — across an index of 43,000+ MCP servers.