listLabels
Lists all Gmail labels for the authenticated user, including system labels (INBOX, SENT, STARRED, UNREAD, etc.) and custom user-created labels. Use the returned IDs with modifyMessageLabels or listMessages labelIds filter.
This record as markdown: /tools/a-bonus-google-docs-mcp/listlabels.md
What listLabels does on Claude MCP x Google Docs
AI agents call listLabels 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.
Why listLabels is rated Low
This tool queries and retrieves existing Gmail label metadata without modifying, deleting, or executing any operations. It is purely informational and read-only in nature, representing the lowest risk category.
From the tool's definition Tool name 'listLabels' and description 'Lists all Gmail labels' indicate a retrieval operation with no side effects.
Attacks that exploit this kind of access
The rule that runs listLabels 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 listLabels, this is the rule to start with:
listLabels is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Claude MCP x Google Docs, apply this rule, and every listLabels call is checked against it from then on.
Questions about listLabels
Lists all Gmail labels for the authenticated user, including system labels (INBOX, SENT, STARRED, UNREAD, etc.) and custom user-created labels. Use the returned IDs with modifyMessageLabels or listMessages labelIds filter. It is categorised as a Read tool in the Claude MCP x Google Docs MCP Server, which means it retrieves data without modifying state.
Register the Claude MCP x Google Docs MCP server in PolicyLayer and add a rule for listLabels: 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.
listLabels is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the listLabels 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.
Set action: deny in the PolicyLayer policy for listLabels. 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.
listLabels 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.
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