add_reactions

SERVERGuildControl MCP SOURCEguildctl

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/app-lasers-guildcontrol-discord/add-reactions.md

WHAT IT DOES

What add_reactions does on GuildControl MCP

AI agents use add_reactions to create or update resources in GuildControl MCP, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your GuildControl MCP environment.

RISK

Why add_reactions is rated Medium

Modifies message state by adding reactions reversibly; allowlist and validation mitigate blast radius from unintended channels.

From the tool's definition add reactions to message; idempotent write; explicit allowlist validation

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs add_reactions safely

PolicyLayer is an MCP gateway: it sits between your AI agents and GuildControl MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For add_reactions, this is the rule to start with:

add_reactions Rate-limited

add_reactions 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_reactions": {
      "limits": [
        {
          "counter": "add_reactions_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect GuildControl MCP, apply this rule, and every add_reactions call is checked against it from then on.

FAQ

Questions about add_reactions

What does the add_reactions tool do? +

Idempotently add an ordered set of ${REACTION_LIMITS.addSetEmojisMinimum}-${REACTION_LIMITS.addSetEmojis} unique verified-bot reactions to one exact message in an explicitly allowlisted Discord channel. Validates the complete set before writing, stops at the first failure, and can be safely retried with the identical order. It is categorised as a Write tool in the GuildControl MCP 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_reactions? +

Register the GuildControl MCP server in PolicyLayer and add a rule for add_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 GuildControl MCP. Nothing to install.

What risk level is add_reactions? +

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

Can I rate-limit add_reactions? +

Yes. Add a rate_limit block to the add_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.

How do I block add_reactions completely? +

Set action: deny in the PolicyLayer policy for add_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.

What MCP server provides add_reactions? +

add_reactions is provided by the GuildControl MCP server (guildctl). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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