Search messages with specific keyword/flag with optional date range. Auto-connects if not already connected.
AI agents call search_with_keyword to retrieve information from Mcp Mail Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool searches and retrieves email messages based on keywords and flags within an optional date range. It performs a read-only operation on existing mailbox data with no capability to create, modify, or delete messages. The auto-connect behavior is transparent setup for the search query itself. It belongs in the Read category as a query/search function.
From the tool's definition Tool name 'search_with_keyword' and description 'Search messages with specific keyword/flag' indicates data retrieval without modification. The phrase 'Auto-connects if not already connected' shows no side effects beyond querying existing data.
Attacks that exploit this kind of access
Search messages with specific keyword/flag with optional date range. Auto-connects if not already connected. It is categorised as a Read tool in the Mcp Mail Server MCP Server, which means it retrieves data without modifying state.
Register the Mcp Mail Server MCP server in PolicyLayer and add a rule for search_with_keyword: 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 Mcp Mail Server. Nothing to install.
search_with_keyword 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_with_keyword 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_with_keyword. 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_with_keyword is provided by the Mcp Mail Server MCP server (mcp-mail-server). 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.
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