stop_ui

Alias for close_ui — stop the Web UI server.

SERVERProject Guardian MCP SOURCE1999azzar/project-guardian-mcp-server

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/1999azzar-project-guardian-mcp-server/stop-ui.md

WHAT IT DOES

What stop_ui does on Project Guardian MCP

AI agents invoke stop_ui to trigger actions in Project Guardian MCP. 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.

RISK

Why stop_ui is rated High

Terminates a UI process; execution-class action with minimal blast radius on this server.

From the tool's definition stop the Web UI server — stops external operation without data loss.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs stop_ui safely

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

stop_ui Rate-limited

stop_ui 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": {
    "stop_ui": {
      "limits": [
        {
          "counter": "stop_ui_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Project Guardian MCP, apply this rule, and every stop_ui call is checked against it from then on.

FAQ

Questions about stop_ui

What does the stop_ui tool do? +

Alias for close_ui — stop the Web UI server. It is categorised as a Execute tool in the Project Guardian MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on stop_ui? +

Register the Project Guardian MCP server in PolicyLayer and add a rule for stop_ui: 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 Project Guardian MCP. Nothing to install.

What risk level is stop_ui? +

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

Can I rate-limit stop_ui? +

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

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

stop_ui is provided by the Project Guardian MCP server (1999azzar/project-guardian-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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