neuron_send_reaction

Send or remove an emoji reaction on a WhatsApp message. Pass an empty emoji string to remove a reaction.

SERVERNeuron SOURCEneuron-mcp-server

Medium RISK CLASS

Category Write

Parameters 44 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-conquext-neuron/neuron-send-reaction.md

WHAT IT DOES

What neuron_send_reaction does on Neuron

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

Parameter	Type	Required	Description
`to`	string	Yes	Chat JID (e.g. '2348012345678@s.whatsapp.net' or group JID)
`emoji`	string	Yes	Emoji character (e.g. '👍', '❤️'), or empty string to remove reaction
`channelId`	string	Yes	WhatsApp channel identifier (UUID)
`messageId`	string	Yes	WhatsApp message ID to react to

Parameters from the server's own tool schema.

RISK

Why neuron_send_reaction is rated Medium

Sending a reaction creates a new emoji reaction metadata on a message, which is a reversible write operation. Removing a reaction (via empty emoji string) undoes this change. Neither action is destructive (messages and data remain intact), nor does it execute code or access sensitive data. The blast radius is minimal—limited to modifying reaction emojis on specific messages.

From the tool's definition Tool description states 'Send or remove an emoji reaction on a WhatsApp message.' The actions are 'send' (create) and 'remove' (delete/revert), both of which modify message metadata reversibly.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs neuron_send_reaction safely

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

neuron_send_reaction Rate-limited

neuron_send_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": {
    "neuron_send_reaction": {
      "limits": [
        {
          "counter": "neuron_send_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 Neuron, apply this rule, and every neuron_send_reaction call is checked against it from then on.

FAQ

Questions about neuron_send_reaction

What does the neuron_send_reaction tool do? +

Send or remove an emoji reaction on a WhatsApp message. Pass an empty emoji string to remove a reaction. It is categorised as a Write tool in the Neuron MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does neuron_send_reaction accept? +

neuron_send_reaction accepts 4 parameters: to, emoji, channelId, messageId. Required: to, emoji, channelId, messageId. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on neuron_send_reaction? +

Register the Neuron MCP server in PolicyLayer and add a rule for neuron_send_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 Neuron. Nothing to install.

What risk level is neuron_send_reaction? +

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

Can I rate-limit neuron_send_reaction? +

Yes. Add a rate_limit block to the neuron_send_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 neuron_send_reaction completely? +

Set action: deny in the PolicyLayer policy for neuron_send_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 neuron_send_reaction? +

neuron_send_reaction is provided by the Neuron MCP server (neuron-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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