hippo_assess_fact_freshness
FORGIA #291 — Round 7: assess freshness of a single
This record as markdown: /tools/verimem/hippo-assess-fact-freshness.md
What hippo_assess_fact_freshness does on Verimem
AI agents call hippo_assess_fact_freshness 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_assess_fact_freshness is rated Low
This tool appears to check the age or validity of cached/stored facts, which is a read-only retrieval operation. The verb 'assess' combined with 'freshness' suggests querying temporal metadata rather than modifying state or executing code. No side effects are indicated. Confidence is high despite incomplete description because the operation type is clearly informational/diagnostic.
From the tool's definition Tool name 'hippo_assess_fact_freshness' and description 'assess freshness of a single' indicate a query/assessment operation that retrieves or evaluates metadata about data freshness. No modification, deletion, or execution of external systems is described.
Attacks that exploit this kind of access
The rule that runs hippo_assess_fact_freshness 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_assess_fact_freshness, this is the rule to start with:
hippo_assess_fact_freshness 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_assess_fact_freshness call is checked against it from then on.
Questions about hippo_assess_fact_freshness
FORGIA #291 — Round 7: assess freshness of a single. 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_assess_fact_freshness: 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_assess_fact_freshness 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_assess_fact_freshness 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_assess_fact_freshness. 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_assess_fact_freshness 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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