modifyMessageLabels

SERVERClaude MCP x Google Docs SOURCEa-bonus/google-docs-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/a-bonus-google-docs-mcp/modifymessagelabels.md

WHAT IT DOES

What modifyMessageLabels does on Claude MCP x Google Docs

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

RISK

Why modifyMessageLabels is rated Medium

This tool modifies Gmail message state by adding or removing labels. While the changes are reversible (labels can be added back, messages can be unstarred, etc.), the tool can affect message visibility and organization in ways that could interfere with user workflows if misused by an AI agent—for example, automatically archiving or labeling important messages.

From the tool's definition The tool description states it 'Adds and/or removes labels on a Gmail message' and provides examples like starring, archiving, marking read, and applying custom labels. These are reversible modifications to message metadata.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs modifyMessageLabels safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Claude MCP x Google Docs, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For modifyMessageLabels, this is the rule to start with:

modifyMessageLabels Rate-limited

modifyMessageLabels 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": {
    "modifyMessageLabels": {
      "limits": [
        {
          "counter": "modifymessagelabels_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Claude MCP x Google Docs, apply this rule, and every modifyMessageLabels call is checked against it from then on.

FAQ

Questions about modifyMessageLabels

What does the modifyMessageLabels tool do? +

Adds and/or removes labels on a Gmail message. Use this to star (add STARRED), archive (remove INBOX), mark read (remove UNREAD), or apply custom labels. Discover label IDs with listLabels. At least one of addLabelIds or removeLabelIds must be provided. It is categorised as a Write tool in the Claude MCP x Google Docs MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on modifyMessageLabels? +

Register the Claude MCP x Google Docs MCP server in PolicyLayer and add a rule for modifyMessageLabels: 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 Claude MCP x Google Docs. Nothing to install.

What risk level is modifyMessageLabels? +

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

Can I rate-limit modifyMessageLabels? +

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

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

modifyMessageLabels is provided by the Claude MCP x Google Docs MCP server (a-bonus/google-docs-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Claude MCP x Google Docs, and thousands of servers like it.

This server

All 84 Claude MCP x Google Docs tools →

Across the catalogue

The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →