hippo_recall_explain
FORGIA #198. Like hippo_recall but each result
This record as markdown: /tools/verimem/hippo-recall-explain.md
What hippo_recall_explain does on Verimem
AI agents call hippo_recall_explain to retrieve information from Verimem without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why hippo_recall_explain is rated Low
This tool queries or retrieves data from the bi-temporal memory system and explains results, consistent with Read category behavior (search, fetch, get). There is no indication of data creation, modification, deletion, code execution, or financial operations. Severity is low because retrieval operations have minimal blast radius.
From the tool's definition Tool name contains 'recall' and description indicates it retrieves/explains results similar to `hippo_recall`, which is a memory retrieval operation. The verb 'recall' and context of a 'memory engine' indicate data querying without modification.
Attacks that exploit this kind of access
The rule that runs hippo_recall_explain safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Verimem, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For hippo_recall_explain, this is the rule to start with:
hippo_recall_explain is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Verimem, apply this rule, and every hippo_recall_explain call is checked against it from then on.
Questions about hippo_recall_explain
FORGIA #198. Like hippo_recall but each result. It is categorised as a Read tool in the Verimem MCP Server, which means it retrieves data without modifying state.
Register the Verimem MCP server in PolicyLayer and add a rule for hippo_recall_explain: 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 Verimem. Nothing to install.
hippo_recall_explain 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 hippo_recall_explain 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 hippo_recall_explain. 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.
hippo_recall_explain is provided by the Verimem MCP server (aureliocpr-ctrl/verimem). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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