keyid_update_message · KeyID Agent Kit MCP: Risk & Policy

WHAT IT DOES

What keyid_update_message does on KeyID Agent Kit

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

WHY IT NEEDS A POLICY

Why keyid_update_message needs a policy

This tool modifies message state (read/starred flags) reversibly without deleting data or executing arbitrary code. Flag updates are standard email operations that can be undone. While part of an email management system, this specific operation is limited to metadata updates, placing it in the Write category rather than Execute or Destructive.

From the tool's definition Tool name 'keyid_update_message' combined with description 'Update message flags (read/starred status)' indicates modification of message metadata attributes.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

keyid_update_message Rate-limited

keyid_update_message 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": {
    "keyid_update_message": {
      "limits": [
        {
          "counter": "keyid_update_message_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 KeyID Agent Kit, so you can run agents against it safely.

FAQ

Questions about keyid_update_message

What does the keyid_update_message tool do? +

Update message flags (read/starred status). It is categorised as a Write tool in the KeyID Agent Kit MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on keyid_update_message? +

Register the KeyID Agent Kit MCP server in PolicyLayer and add a rule for keyid_update_message: 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 KeyID Agent Kit. Nothing to install.

What risk level is keyid_update_message? +

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

Can I rate-limit keyid_update_message? +

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

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

keyid_update_message is provided by the KeyID Agent Kit MCP server (keyid-ai/agent-kit). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.