preview_line_draft

Preview one line draft without publishing it.

SERVEREchoRelay SOURCEhttps://mcp.echorelay.dev

Medium RISK CLASS

Category Write

Parameters 11 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/dev-echorelay-management/preview-line-draft.md

WHAT IT DOES

What preview_line_draft does on EchoRelay

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

Parameter	Type	Required	Description
`lineKey`	string	Yes	The line key, e.g. "v1".

Parameters from the server's own tool schema.

RISK

Why preview_line_draft is rated Medium

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

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs preview_line_draft safely

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

preview_line_draft Rate-limited

preview_line_draft 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": {
    "preview_line_draft": {
      "limits": [
        {
          "counter": "preview_line_draft_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 EchoRelay, apply this rule, and every preview_line_draft call is checked against it from then on.

FAQ

Questions about preview_line_draft

What does the preview_line_draft tool do? +

Preview one line draft without publishing it. It is categorised as a Write tool in the EchoRelay MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does preview_line_draft accept? +

preview_line_draft accepts 1 parameter: lineKey. Required: lineKey. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on preview_line_draft? +

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

What risk level is preview_line_draft? +

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

Can I rate-limit preview_line_draft? +

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

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

preview_line_draft is provided by the EchoRelay MCP server (https://mcp.echorelay.dev). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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