contextual_memento_search
AI agents call contextual_memento_search 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.
The tool retrieves or queries data from the persistent memory store without creating, modifying, or deleting any information. No description was provided, but the naming pattern and context from sibling tools strongly suggests this performs lookups/searches.
From the tool's definition Tool name 'contextual_memento_search' and sibling tools like 'find_memento_patterns', 'find_path_between_mementos', 'get_central_mementos', and 'get_low_confidence_mementos' indicate this is a search/query operation.
Attacks that exploit this kind of access
contextual_memento_search. 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 contextual_memento_search: 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.
contextual_memento_search 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 contextual_memento_search 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 contextual_memento_search. 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.
contextual_memento_search 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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