neuron_send_message

Send a message to an existing conversation. Supports text, image, and document message types with optional media attachments.

SERVERNeuron SOURCEneuron-mcp-server

Medium RISK CLASS

Category Write

Parameters 42 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-message.md

WHAT IT DOES

What neuron_send_message does on Neuron

AI agents use neuron_send_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
`id`	string	Yes	Unique identifier (UUID) of the conversation
`content`	string	Yes	Message content to send
`mediaUrl`	string	—	URL of media to attach (required for image/document message types)
`messageType`	string	—	Type of message: 'text' (default), 'image', or 'document'

Parameters from the server's own tool schema.

RISK

Why neuron_send_message is rated Medium

This tool creates new message records in an existing conversation—a reversible write operation. Severity is medium because misuse could result in unwanted messages being sent to contacts (spam, sensitive information disclosure, harassment), but the action is not destructive, financial, or code execution.

From the tool's definition Tool description states it will 'Send a message to an existing conversation' with support for various message types and attachments, which creates new message data in the conversation thread.

Risk signalsAccepts raw HTML/template content (content)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs neuron_send_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_send_message, this is the rule to start with:

neuron_send_message Rate-limited

neuron_send_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_send_message": {
      "limits": [
        {
          "counter": "neuron_send_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_send_message call is checked against it from then on.

FAQ

Questions about neuron_send_message

What does the neuron_send_message tool do? +

Send a message to an existing conversation. Supports text, image, and document message types with optional media attachments. 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_message accept? +

neuron_send_message accepts 4 parameters: id, content, mediaUrl, messageType. Required: id, content. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on neuron_send_message? +

Register the Neuron MCP server in PolicyLayer and add a rule for neuron_send_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_send_message? +

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

Can I rate-limit neuron_send_message? +

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

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

neuron_send_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.

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