markAsRead · Google Workspace MCP Server MCP: Risk & Policy

WHAT IT DOES

What markAsRead does on Google Workspace MCP Server

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

WHY IT NEEDS A POLICY

Why markAsRead needs a policy

This tool modifies Gmail message state by removing the UNREAD label, making it a Write operation (reversible metadata modification). The impact is limited to label state with no data deletion or creation, resulting in low severity. High confidence due to clear, explicit description of the action performed.

From the tool's definition Tool description states 'Mark a Gmail message as read by removing the UNREAD label' – this modifies the state of a Gmail message by removing a label, which is a reversible change to metadata.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

markAsRead Rate-limited

markAsRead 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": {
    "markAsRead": {
      "limits": [
        {
          "counter": "markasread_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 Google Workspace MCP Server, so you can run agents against it safely.

FAQ

Questions about markAsRead

What does the markAsRead tool do? +

Mark a Gmail message as read by removing the UNREAD label. It is categorised as a Write tool in the Google Workspace 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 markAsRead? +

Register the Google Workspace MCP Server MCP server in PolicyLayer and add a rule for markAsRead: 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 Google Workspace MCP Server. Nothing to install.

What risk level is markAsRead? +

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

Can I rate-limit markAsRead? +

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

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

markAsRead is provided by the Google Workspace MCP Server MCP server (pm990320/google-workspace-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.