channel_create · Wmux MCP: Risk & Policy

WHAT IT DOES

What channel_create does on Wmux

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

WHY IT NEEDS A POLICY

Why channel_create needs a policy

The tool creates a new channel (reversible write operation). While channel creation itself is not destructive, it modifies the server state by adding a new persistent entity. Severity is medium because misuse could create numerous channels consuming resources or cluttering the workspace, but individual channels can typically be deleted.

From the tool's definition Create a new channel

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

channel_create Rate-limited

channel_create 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": {
    "channel_create": {
      "limits": [
        {
          "counter": "channel_create_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Wmux, so you can run agents against it safely.

FAQ

Questions about channel_create

What does the channel_create tool do? +

Create a new channel. The creator is auto-added as a member with full history (plan KTD10). Visibility is immutable post-creation; a. It is categorised as a Write tool in the Wmux MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on channel_create? +

Register the Wmux MCP server in PolicyLayer and add a rule for channel_create: 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 Wmux. Nothing to install.

What risk level is channel_create? +

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

Can I rate-limit channel_create? +

Yes. Add a rate_limit block to the channel_create 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 channel_create completely? +

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

channel_create is provided by the Wmux MCP server (openwong2kim/wmux). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

// THE FULL RECORD

channel_create is one line of Wmux's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

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