hippo_facts_recent
FORGIA #269 — last N facts by created_at
This record as markdown: /tools/verimem/hippo-facts-recent.md
What hippo_facts_recent does on Verimem
AI agents call hippo_facts_recent 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_facts_recent is rated Low
This tool queries and retrieves historical facts ordered by creation time. It is a read-only operation with no side effects, no data modification, and no ability to trigger external actions. The narrow, deterministic nature of timestamp-based retrieval and the context of a 'memory engine' confirm this is a simple data retrieval function.
From the tool's definition 'last N facts by created_at' indicates retrieval of recent facts based on a timestamp filter; no modification, deletion, or execution described.
Attacks that exploit this kind of access
The rule that runs hippo_facts_recent 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_facts_recent, this is the rule to start with:
hippo_facts_recent 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_facts_recent call is checked against it from then on.
Questions about hippo_facts_recent
FORGIA #269 — last N facts by created_at. 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_facts_recent: 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_facts_recent 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_facts_recent 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_facts_recent. 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_facts_recent 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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