listMessages

Lists Gmail messages for the authenticated user. Supports the full Gmail search syntax via the q parameter (e.g.

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

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

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

WHAT IT DOES

What listMessages does on Claude MCP x Google Docs

AI agents call listMessages to retrieve information from Claude MCP x Google Docs without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why listMessages is rated Low

This tool retrieves and queries Gmail message metadata without altering data or triggering external actions. It is a straightforward read operation that returns information to the user. The search capability does not elevate it beyond Read category since it only filters results, not modifies them.

From the tool's definition Tool name 'listMessages' and description 'Lists Gmail messages' indicate data retrieval with no modification or side effects. Supports search via 'q parameter' but does not delete, modify, send, or execute operations on messages.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs listMessages 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 listMessages, this is the rule to start with:

listMessages Allowed

listMessages is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "listMessages": {}
  }
}

ALLOW ONLY 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 listMessages call is checked against it from then on.

FAQ

Questions about listMessages

What does the listMessages tool do? +

Lists Gmail messages for the authenticated user. Supports the full Gmail search syntax via the q parameter (e.g. It is categorised as a Read tool in the Claude MCP x Google Docs MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on listMessages? +

Register the Claude MCP x Google Docs MCP server in PolicyLayer and add a rule for listMessages: 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 listMessages? +

listMessages is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit listMessages? +

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

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

listMessages 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

Roll out MCP under one policy →Data exfiltration →MCP token cost →