Get statistics about the memento database
AI agents call get_memento_statistics to retrieve information from MCP Memento 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 statistical data from the memento database. It has no side effects, does not modify or delete data, and does not execute code or trigger external operations. It falls squarely within the Read category as a data retrieval operation.
From the tool's definition Tool name 'get_memento_statistics' and description 'Get statistics about the memento database' indicate retrieval of aggregated information about stored mementos without modification, deletion, or execution of external operations.
Attacks that exploit this kind of access
Get statistics about the memento database. It is categorised as a Read tool in the MCP Memento MCP Server, which means it retrieves data without modifying state.
Register the MCP Memento MCP server in PolicyLayer and add a rule for get_memento_statistics: 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 Memento. Nothing to install.
get_memento_statistics 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 get_memento_statistics 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 get_memento_statistics. 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.
get_memento_statistics is provided by the MCP Memento MCP server (x-hannibal/mcp-memento). 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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