batch_modify_emails · Gmail AutoAuth MCP Server MCP

WHAT IT DOES

What batch_modify_emails does on Gmail AutoAuth MCP Server

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

WHY IT NEEDS A POLICY

Why batch_modify_emails needs a policy

Label modifications are reversible write operations—labels can be added or removed without destroying underlying email data. The batch nature increases blast radius (could affect many emails at once), justifying medium severity. This is Write rather than Execute because it modifies specific email metadata through a defined API rather than executing arbitrary code or commands.

From the tool's definition Tool performs batch modification of email labels, which creates or modifies data (label associations) reversibly.

Risk signalsBulk/mass operation — affects multiple targets

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

batch_modify_emails Rate-limited

batch_modify_emails 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": {
    "batch_modify_emails": {
      "limits": [
        {
          "counter": "batch_modify_emails_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 Gmail AutoAuth MCP Server, so you can run agents against it safely.

FAQ

Questions about batch_modify_emails

What does the batch_modify_emails tool do? +

Modifies labels for multiple emails in batches. It is categorised as a Write tool in the Gmail AutoAuth 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 batch_modify_emails? +

Register the Gmail AutoAuth MCP Server MCP server in PolicyLayer and add a rule for batch_modify_emails: 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 Gmail AutoAuth MCP Server. Nothing to install.

What risk level is batch_modify_emails? +

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

Can I rate-limit batch_modify_emails? +

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

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

batch_modify_emails is provided by the Gmail AutoAuth MCP Server MCP server (rmcaccounting/gmail-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.