add_reaction

Add an emoji reaction to an activity message.

SERVERHuly SOURCEdugynoo/huly-mcp

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/dugynoo-huly-mcp/add-reaction.md

WHAT IT DOES

What add_reaction does on Huly

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

RISK

Why add_reaction is rated Medium

This tool creates a new emoji reaction, which is a reversible modification of data (the reaction can be removed). It has no destructive, financial, or code execution implications. The blast radius is minimal as emoji reactions are cosmetic user interactions. Classified as Write rather than Read because it modifies state by adding a reaction.

From the tool's definition Tool name 'add_reaction' and description 'Add an emoji reaction to an activity message' indicate creation of a new reaction entry.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs add_reaction safely

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

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.

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

FAQ

Questions about add_reaction

What does the add_reaction tool do? +

Add an emoji reaction to an activity message. It is categorised as a Write tool in the Huly 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 Huly 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 Huly. 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 Huly MCP server (dugynoo/huly-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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