line_test_webhook

THE RISK

High Risk

This tool sends a test/ping request to the LINE Official Account webhook endpoint. It triggers an external network operation but has no persistent side effects on data. It falls under Execute since it initiates an external operation. Severity is low as a webhook ping is generally harmless. Confidence is moderate because the description is very brief and uninformative.

From the tool's definition 'Ping the OA' - triggers an external operation (webhook ping) against the LINE Official Account

Documented attack patterns abuse exactly the kind of access line_test_webhook gives an agent:

HOW TO CONTROL LINE_TEST_WEBHOOK

PolicyLayer is an MCP gateway — it sits between your AI agents and Line Oa Mcp Ultimate, and nothing reaches the server without passing your rules. This is the rule we recommend for line_test_webhook:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "line_test_webhook": {
      "limits": [
        {
          "counter": "line_test_webhook_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

line_test_webhook stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register Line Oa Mcp Ultimate — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

More Line Oa Mcp Ultimate tools

Destructive line_delete_audience Delete an audience group. Irreversible — requires confirm=true. Args: - audience_group_ Destructive line_delete_rich_menu Delete a rich menu by ID. If the menu is currently linked to specific users, those links b Execute line_run_on_many_oas Agency feature — run any read-only line_ tool across many OAs in parallel. Errors on indiv Write line_build_audience_from_csv Create a new LINE audience by uploading user IDs (or IFAs). After creation LINE indexes th Write line_build_audience_from_engagement Create a LINE audience from people who clicked or opened a previous broadcast / narrowcast Write line_build_rich_menu Create a LINE Rich Menu in one call: validate → create → upload image → set as default. Co Write line_design_card Build a validated Template message (LINE OA Manager calls this a Write line_design_imagemap Build a validated Imagemap message (LINE OA Manager calls this a

All 34 Line Oa Mcp Ultimate tools →

Execute tools on other servers

Frida Game Hacking MCP remove_breakpoint Procmon request_elevation WireMCP capture_packets Pentest Ai run_probe

Go deeper

High-risk tools in Line Oa Mcp Ultimate → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

What does the line_test_webhook tool do? +

Ping the OA. It is categorised as a Execute tool in the Line Oa Mcp Ultimate MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on line_test_webhook? +

Register the Line Oa Mcp Ultimate MCP server in PolicyLayer and add a rule for line_test_webhook: 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 Line Oa Mcp Ultimate. Nothing to install.

What risk level is line_test_webhook? +

line_test_webhook is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit line_test_webhook? +

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

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

line_test_webhook is provided by the Line Oa Mcp Ultimate MCP server (wasintoh/line-oa-mcp-ultimate). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Line Oa Mcp Ultimate tool call.

Deterministic rules across all 34 Line Oa Mcp Ultimate tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

GOVERN LINE OA MCP ULTIMATE →

Free to start. No card required.

34 Line Oa Mcp Ultimate tools catalogued and risk-classified — across an index of 42,500+ MCP servers.

// WHAT LINE_TEST_WEBHOOK ON LINE OA MCP ULTIMATE DOES

// THE RISK

// HOW TO CONTROL LINE_TEST_WEBHOOK

// EXPLORE