Search Gmail using either a raw Gmail query or structured filter fields.
AI agents call search_gmail_messages to retrieve information from Sudo Mcp Gmail without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves email data based on search criteria without modifying, deleting, or executing actions on emails. It falls squarely into the Read category as a data retrieval function. Severity is low because search operations have minimal blast radius—the worst outcome is information disclosure of emails the user already has access to. Confidence is high based on clear functional semantics.
From the tool's definition Tool name is 'search_gmail_messages' and description states it 'Search[es] Gmail using either a raw Gmail query or structured filter fields.' This is a query/search operation with no modification, creation, or deletion of data.
Attacks that exploit this kind of access
Search Gmail using either a raw Gmail query or structured filter fields. It is categorised as a Read tool in the Sudo Mcp Gmail MCP Server, which means it retrieves data without modifying state.
Register the Sudo Mcp Gmail MCP server in PolicyLayer and add a rule for search_gmail_messages: 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 Sudo Mcp Gmail. Nothing to install.
search_gmail_messages 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 search_gmail_messages 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 search_gmail_messages. 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.
search_gmail_messages is provided by the Sudo Mcp Gmail MCP server (sahilyadav902/sudo-mcp-gmail). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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