add_reaction · mcp-discord-chat MCP server MCP

WHAT IT DOES

What add_reaction does on mcp-discord-chat MCP server

AI agents use add_reaction to create or update resources in mcp-discord-chat MCP server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your mcp-discord-chat MCP server environment.

WHY IT NEEDS A POLICY

Why add_reaction needs a policy

This is a Write operation because it creates a new reaction association (reversible metadata change) on a message. It does not read-only retrieve data (Read), execute arbitrary code (Execute), permanently delete anything (Destructive), or involve financial transactions (Financial).

From the tool's definition The tool 'add_reaction' performs an action that modifies message state by adding a reaction (emoji) to an existing message.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_reaction Rate-limited

add_reaction 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "add_reaction": {
      "limits": [
        {
          "counter": "add_reaction_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches mcp-discord-chat MCP server, so you can run agents against it safely.

FAQ

Questions about add_reaction

What does the add_reaction tool do? +

Add a reaction to a message. It is categorised as a Write tool in the mcp-discord-chat MCP server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_reaction? +

Register the mcp-discord-chat MCP server MCP server in PolicyLayer and add a rule for add_reaction: 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 mcp-discord-chat MCP server. Nothing to install.

What risk level is add_reaction? +

add_reaction is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit add_reaction? +

Yes. Add a rate_limit block to the add_reaction 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.

How do I block add_reaction completely? +

Set action: deny in the PolicyLayer policy for add_reaction. 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.

What MCP server provides add_reaction? +

add_reaction is provided by the mcp-discord-chat MCP server MCP server (koladev32/mcp-discord-chat). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.