send-message

Send a message through the messaging service. The recipient will receive it and may reply, which will appear as a channel notification.

SERVERFrontmcp SOURCEagentfront/frontmcp

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/frontmcp/send-message.md

WHAT IT DOES

What send-message does on Frontmcp

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

RISK

Why send-message is rated Medium

This tool creates new data (messages) in a reversible manner typical of Write operations. It is not Read (it modifies system state by sending), not Destructive (messages can be edited or deleted later), not Execute (it does not run arbitrary code—it invokes a specific business operation), and not Financial.

From the tool's definition The tool 'send-message' explicitly describes sending a message that 'the recipient will receive it and may reply', indicating creation of new communication data in the system with potential side effects on recipient state and notification systems.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs send-message safely

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

send-message Rate-limited

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": {
    "send-message": {
      "limits": [
        {
          "counter": "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 Frontmcp, apply this rule, and every send-message call is checked against it from then on.

FAQ

Questions about send-message

What does the send-message tool do? +

Send a message through the messaging service. The recipient will receive it and may reply, which will appear as a channel notification. It is categorised as a Write tool in the Frontmcp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on send-message? +

Register the Front MCP server in PolicyLayer and add a rule for 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 Frontmcp. Nothing to install.

What risk level is send-message? +

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

Can I rate-limit send-message? +

Yes. Add a rate_limit block to the 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 send-message completely? +

Set action: deny in the PolicyLayer policy for 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 send-message? +

send-message is provided by the Front MCP server (agentfront/frontmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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