Retrieves all Gmail filters
AI agents call list_filters to retrieve information from Gmail AutoAuth MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and lists existing Gmail filters—a read-only operation with no side effects. It queries data from Gmail's filter configuration but does not create, modify, or delete filters. The blast radius of misuse is minimal; an attacker learning about filters does not gain direct access to emails or enable unauthorized actions without combining this with other tools like 'create_filter' or 'delete_filter'.
From the tool's definition Tool name 'list_filters' and description 'Retrieves all Gmail filters' indicate a query operation that fetches filter data without modification or deletion.
Attacks that exploit this kind of access
Retrieves all Gmail filters. It is categorised as a Read tool in the Gmail AutoAuth MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Gmail AutoAuth MCP Server MCP server in PolicyLayer and add a rule for list_filters: 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.
list_filters 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 list_filters 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 list_filters. 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.
list_filters 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.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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