neuron_compose_message

Compose and send a new message to a phone number via a specific channel. Automatically creates a new conversation if one does not exist.

SERVERNeuron SOURCEneuron-mcp-server

Medium RISK CLASS

Category Write

Parameters 82 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-compose-message.md

WHAT IT DOES

What neuron_compose_message does on Neuron

AI agents use neuron_compose_message 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	Recipient phone number (E.164 format, e.g., '2348012345678')
`text`	string	—	Message text content (optional when sending a template)
`sendAt`	string	—	ISO 8601 date-time for scheduled delivery (e.g., '2025-12-31T10:00:00Z'). Message sends immediately if omitted.
`mediaUrl`	string	—	URL of media to attach (required for non-text message types)
`template`	object	—	Approved template (official WhatsApp Business API sessions only). Required to reach anyone who hasn't messaged you in the last 24 hours. Set messageType to 'tem
`channelId`	string	Yes	Unique identifier (UUID) of the WhatsApp channel to send through
`contactName`	string	—	Display name for the recipient contact
`messageType`	string	—	Type of message: 'text' (default), 'image', 'document', or 'template' (official API sessions)

Parameters from the server's own tool schema.

RISK

Why neuron_compose_message is rated Medium

An AI agent can call neuron_compose_message faster than any human can review: one bad instruction and it creates or modifies resources in Neuron by the hundred, each call as confident as the last.

Risk signalsAccepts raw HTML/template content (template) · High parameter count (11 properties)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs neuron_compose_message 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_compose_message, this is the rule to start with:

neuron_compose_message Rate-limited

neuron_compose_message 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_compose_message": {
      "limits": [
        {
          "counter": "neuron_compose_message_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_compose_message call is checked against it from then on.

FAQ

Questions about neuron_compose_message

What does the neuron_compose_message tool do? +

Compose and send a new message to a phone number via a specific channel. Automatically creates a new conversation if one does not exist. 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_compose_message accept? +

neuron_compose_message accepts 8 parameters: to, text, sendAt, mediaUrl, template, channelId, contactName, messageType. Required: to, channelId. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on neuron_compose_message? +

Register the Neuron MCP server in PolicyLayer and add a rule for neuron_compose_message: 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_compose_message? +

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

Can I rate-limit neuron_compose_message? +

Yes. Add a rate_limit block to the neuron_compose_message 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_compose_message completely? +

Set action: deny in the PolicyLayer policy for neuron_compose_message. 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_compose_message? +

neuron_compose_message 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.

KEEP EXPLORING

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