Read the full content of a specific memento note by path or note name. Use after memento_search when a result path needs full content, or directly when the user already supplied an exact note path/name. Do not use for topical discovery; search first.
AI agents call memento_get to retrieve information from Memento Vault without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
memento_get retrieves stored notes by path or name without altering, creating, or deleting data. It has no side effects beyond data retrieval, making it a Read category tool. Severity is low because reading stored notes from a vault poses minimal risk to system integrity or data safety, even if an AI agent misuses it by accessing notes without authorization—the action itself is non-destructive and read-only.
From the tool's definition Tool description explicitly states 'Read the full content of a specific memento note' and is used 'after memento_search when a result path needs full content'. The action is retrieval-only with no modification, creation, or deletion.
Documented attack patterns abuse exactly the kind of access memento_get gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Memento Vault, and nothing reaches the server without passing your rules. This is the rule we recommend for memento_get:
{
"version": "1",
"default": "deny",
"tools": {
"memento_get": {}
}
}memento_get is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Read the full content of a specific memento note by path or note name. Use after memento_search when a result path needs full content, or directly when the user already supplied an exact note path/name. Do not use for topical discovery; search first. It is categorised as a Read tool in the Memento Vault MCP Server, which means it retrieves data without modifying state.
Register the Memento Vault MCP server in PolicyLayer and add a rule for memento_get: 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 Memento Vault. Nothing to install.
memento_get 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 memento_get 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 memento_get. 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.
memento_get is provided by the Memento Vault MCP server (sandsower/memento-vault). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Memento Vault, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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14 Memento Vault tools catalogued and risk-classified — across an index of 43,000+ MCP servers.