Search all messages across mailboxes with optional date range and limit. Auto-connects if not already connected.
AI agents call search_all_messages 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 retrieves and queries email messages based on search criteria. It performs no side effects, creates no new data, executes no external code, and does not delete or modify messages. The auto-connect feature is a convenience mechanism that does not change the fundamental nature of the operation.
From the tool's definition Tool description states 'Search all messages' with 'optional date range and limit'. The verb 'search' and the querying nature of the operation indicate data retrieval with no modification or deletion.
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
Search all messages across mailboxes with optional date range and limit. 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_all_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 Mcp Mail Server. Nothing to install.
search_all_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_all_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_all_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_all_messages 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.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →