close_project · Pl MCP: Risk & Policy

WHAT IT DOES

What close_project does on Pl

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

WHY IT NEEDS A POLICY

Why close_project needs a policy

Closing a project changes application state and releases resources, which constitutes a write/modification operation. It is reversible (the project can be reopened), so it does not qualify as Destructive.

From the tool's definition The tool description states it 'Close an opened project, releasing its resources' - this modifies the state of an application by closing an open project, which is a reversible action (the project can be reopened).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

close_project Rate-limited

close_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": {
    "close_project": {
      "limits": [
        {
          "counter": "close_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 Pl, so you can run agents against it safely.

FAQ

Questions about close_project

What does the close_project tool do? +

Close an opened project, releasing its resources. It is categorised as a Write tool in the Pl MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on close_project? +

Register the Pl MCP server in PolicyLayer and add a rule for close_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 Pl. Nothing to install.

What risk level is close_project? +

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

Can I rate-limit close_project? +

Yes. Add a rate_limit block to the close_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 close_project completely? +

Set action: deny in the PolicyLayer policy for close_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 close_project? +

close_project is provided by the Pl MCP server (@milaboratories/pl-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.