complete_cycle · Plane MCP: Risk & Policy

WHAT IT DOES

What complete_cycle does on Plane

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

WHY IT NEEDS A POLICY

Why complete_cycle needs a policy

The tool performs a state modification operation on a project management artifact (a cycle/sprint). This is a Write operation rather than Destructive because completing a cycle is typically reversible in project management systems—the cycle can be edited, reopened, or its status changed again.

From the tool's definition Tool name 'complete_cycle' indicates modification of cycle status from active to complete. The Plane server context shows it manages 'projects, work items, and automations'.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

complete_cycle Rate-limited

complete_cycle 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": {
    "complete_cycle": {
      "limits": [
        {
          "counter": "complete_cycle_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 Plane, so you can run agents against it safely.

FAQ

Questions about complete_cycle

What does the complete_cycle tool do? +

complete_cycle. It is categorised as a Write tool in the Plane MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on complete_cycle? +

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

What risk level is complete_cycle? +

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

Can I rate-limit complete_cycle? +

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

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

complete_cycle is provided by the Plane MCP server (@makeplane/plane-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.