screenshot_one_liner · ShotAPI MCP: Risk & Policy

WHAT IT DOES

What screenshot_one_liner does on ShotAPI

AI agents invoke screenshot_one_liner to trigger actions in ShotAPI. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why screenshot_one_liner needs a policy

The tool name suggests it captures a screenshot in a single call, similar to the sibling 'screenshot' tool. Screenshots involve triggering an external browser/rendering operation, which qualifies as Execute. However, the description is empty, lowering confidence.

From the tool's definition Tool name 'screenshot_one_liner' on a server described as handling 'screenshot' and 'render' operations; sibling tools are 'render' and 'screenshot'.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

screenshot_one_liner Rate-limited

screenshot_one_liner 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.

View as policy code

policy.json

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

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about screenshot_one_liner

What does the screenshot_one_liner tool do? +

screenshot_one_liner. It is categorised as a Execute tool in the ShotAPI MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on screenshot_one_liner? +

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

What risk level is screenshot_one_liner? +

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

Can I rate-limit screenshot_one_liner? +

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

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

screenshot_one_liner is provided by the ShotAPI MCP server (smallhandsome/shotapi-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.