create_sequence_diagram · StarUML MCP Server MCP

WHAT IT DOES

What create_sequence_diagram does on StarUML MCP Server

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

WHY IT NEEDS A POLICY

Why create_sequence_diagram needs a policy

Creating a UML sequence diagram is a write operation that modifies the StarUML project by adding new diagram artifacts. This is reversible (diagrams can be deleted) and has no destructive, financial, or code execution implications. However, severity is medium rather than low because unauthorized diagram generation could disrupt design workflows or embed malicious process documentation in shared projects.

From the tool's definition Tool name 'create_sequence_diagram' indicates diagram creation. Server description states it 'Enables AI to remotely control StarUML for generating UML diagrams'.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_sequence_diagram Rate-limited

create_sequence_diagram 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": {
    "create_sequence_diagram": {
      "limits": [
        {
          "counter": "create_sequence_diagram_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 StarUML MCP Server, so you can run agents against it safely.

FAQ

Questions about create_sequence_diagram

What does the create_sequence_diagram tool do? +

create_sequence_diagram. It is categorised as a Write tool in the StarUML 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 create_sequence_diagram? +

Register the StarUML MCP Server MCP server in PolicyLayer and add a rule for create_sequence_diagram: 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 StarUML MCP Server. Nothing to install.

What risk level is create_sequence_diagram? +

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

Can I rate-limit create_sequence_diagram? +

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

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

create_sequence_diagram is provided by the StarUML MCP Server MCP server (stonesho/staruml_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.