start_ui

Start the Project Guardian Web UI server on demand. Automatically searches for a free port and returns the local HTTP URL.

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/start-ui.md

WHAT IT DOES

What start_ui does on Project Guardian MCP

AI agents invoke start_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 start_ui is rated High

Launches a web UI server process, triggering external operations with uncertain side effects.

From the tool's definition Start server on demand, searches for free port, returns local HTTP URL.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs start_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 start_ui, this is the rule to start with:

start_ui Rate-limited

start_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": {
    "start_ui": {
      "limits": [
        {
          "counter": "start_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 start_ui call is checked against it from then on.

FAQ

Questions about start_ui

What does the start_ui tool do? +

Start the Project Guardian Web UI server on demand. Automatically searches for a free port and returns the local HTTP URL. 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 start_ui? +

Register the Project Guardian MCP server in PolicyLayer and add a rule for start_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 start_ui? +

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

Can I rate-limit start_ui? +

Yes. Add a rate_limit block to the start_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 start_ui completely? +

Set action: deny in the PolicyLayer policy for start_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 start_ui? +

start_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.

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