publish_moment · Timepoint MCP: Risk & Policy

WHAT IT DOES

What publish_moment does on Timepoint MCP

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

WHY IT NEEDS A POLICY

Why publish_moment needs a policy

This tool modifies the state of a moment by transitioning it from private to public within the system's distributed ledger (clockchain). This is a Write operation because it creates a new state/record without irreversible deletion.

From the tool's definition The tool performs 'Publish a private moment to make it publicly visible in the clockchain,' which creates a change in visibility/permissions state of existing data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

publish_moment Rate-limited

publish_moment 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": {
    "publish_moment": {
      "limits": [
        {
          "counter": "publish_moment_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 Timepoint MCP, so you can run agents against it safely.

FAQ

Questions about publish_moment

What does the publish_moment tool do? +

Publish a private moment to make it publicly visible in the clockchain. It is categorised as a Write tool in the Timepoint MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on publish_moment? +

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

What risk level is publish_moment? +

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

Can I rate-limit publish_moment? +

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

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

publish_moment is provided by the Timepoint MCP server (timepointai/timepoint-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.