update_checkpoint · Clink MCP Server MCP: Risk & Policy

WHAT IT DOES

What update_checkpoint does on Clink MCP Server

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

WHY IT NEEDS A POLICY

Why update_checkpoint needs a policy

Update operations modify existing data reversibly, fitting the Write category. Severity is medium because checkpoints are used for progress tracking in multi-agent collaboration—incorrect updates could mislead team progress but are reversible.

From the tool's definition Tool name 'update_checkpoint' indicates modification of checkpoint data. Server context shows checkpoints are progress tracking entities within project management. The 'update' verb indicates reversible modification rather than deletion or creation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_checkpoint Rate-limited

update_checkpoint 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_checkpoint": {
      "limits": [
        {
          "counter": "update_checkpoint_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 Clink MCP Server, so you can run agents against it safely.

FAQ

Questions about update_checkpoint

What does the update_checkpoint tool do? +

update_checkpoint. It is categorised as a Write tool in the Clink 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 update_checkpoint? +

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

What risk level is update_checkpoint? +

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

Can I rate-limit update_checkpoint? +

Yes. Add a rate_limit block to the update_checkpoint 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_checkpoint completely? +

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

update_checkpoint is provided by the Clink MCP Server MCP server (voxos-ai-inc/clink-mcp-server-python). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.