generate_component · its-just-ui MCP Server MCP

WHAT IT DOES

What generate_component does on its-just-ui MCP Server

AI agents use generate_component to create or update resources in its-just-ui MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your its-just-ui MCP Server environment.

WHY IT NEEDS A POLICY

Why generate_component needs a policy

The tool creates new UI component definitions with customizable properties and styles. This falls squarely in the Write category because it generates (creates) new artifacts that can be easily modified or removed. There are no irreversible side effects, financial implications, or arbitrary code execution risks—it operates within the constrained domain of React component generation using the its-just-ui library.

From the tool's definition Tool name 'generate_component' and description 'Generate an its-just-ui component with specified props and styling' indicate creation of component code/definitions.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generate_component Rate-limited

generate_component 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": {
    "generate_component": {
      "limits": [
        {
          "counter": "generate_component_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about generate_component

What does the generate_component tool do? +

Generate an its-just-ui component with specified props and styling. It is categorised as a Write tool in the its-just-ui MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on generate_component? +

Register the its-just-ui MCP Server MCP server in PolicyLayer and add a rule for generate_component: 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 its-just-ui MCP Server. Nothing to install.

What risk level is generate_component? +

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

Can I rate-limit generate_component? +

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

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

generate_component is provided by the its-just-ui MCP Server MCP server (its-just-ui/its-just-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.