open_project · Openl MCP: Risk & Policy

WHAT IT DOES

What open_project does on Openl

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

WHY IT NEEDS A POLICY

Why open_project needs a policy

Opening a project for editing implies acquiring a lock or changing the project's state (e.g., checking it out, marking it as open/in-edit mode). This is a Write-level action as it modifies the project's status/access state, though it does not directly alter data content. It is not purely Read because it prepares the project for mutation and may affect concurrent access by others.

From the tool's definition "Open a project for editing" and "Use this before making changes to project tables or rules"

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

open_project Rate-limited

open_project 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": {
    "open_project": {
      "limits": [
        {
          "counter": "open_project_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 Openl, so you can run agents against it safely.

FAQ

Questions about open_project

What does the open_project tool do? +

Open a project for editing. Supports opening on specific branches or viewing specific Git revisions. Use this before making changes to project tables or rules. It is categorised as a Write tool in the Openl MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on open_project? +

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

What risk level is open_project? +

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

Can I rate-limit open_project? +

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

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

open_project is provided by the Openl MCP server (openl-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.