update_cycle · Plane MCP: Risk & Policy

WHAT IT DOES

What update_cycle does on Plane

AI agents use update_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 update_cycle needs a policy

The 'update' prefix categorizes this as Write rather than Read, as it modifies rather than retrieves data. It is not Destructive (cycles are not deleted), not Execute (no arbitrary code/commands), and not Financial. Confidence is 0.8 rather than higher because the empty description prevents confirmation of exactly what cycle properties can be modified or what safeguards exist.

From the tool's definition Tool name 'update_cycle' with 'update' verb indicates data modification. The tool description is empty, preventing detailed confirmation of scope, but based on sibling tools (create_cycle, complete_cycle) operating on Plane project management entities, this…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_cycle Rate-limited

update_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": {
    "update_cycle": {
      "limits": [
        {
          "counter": "update_cycle_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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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 update_cycle

What does the update_cycle tool do? +

update_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 update_cycle? +

Register the Plane MCP server in PolicyLayer and add a rule for update_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 update_cycle? +

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

Can I rate-limit update_cycle? +

Yes. Add a rate_limit block to the update_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 update_cycle completely? +

Set action: deny in the PolicyLayer policy for update_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 update_cycle? +

update_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.