hippo_outlier_summary
FORGIA #330 — Round 48: top N outlier episodes with
This record as markdown: /tools/verimem/hippo-outlier-summary.md
What hippo_outlier_summary does on Verimem
AI agents call hippo_outlier_summary 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_outlier_summary is rated Low
The tool appears to fetch or summarize outlier data from the memory engine (listing/retrieving episodes), which is a read operation. The incomplete description ('top N outlier episodes with') limits confidence, but the pattern of sibling tools (hippo_assess_*, hippo_audit_summary) and the read-only nature of summarization indicate no side effects. No financial, destructive, or code execution indicators are present.
From the tool's definition Tool name 'hippo_outlier_summary' and description indicating retrieval of 'top N outlier episodes' suggests querying and summarizing data without modification or deletion.
Attacks that exploit this kind of access
The rule that runs hippo_outlier_summary 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_outlier_summary, this is the rule to start with:
hippo_outlier_summary 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_outlier_summary call is checked against it from then on.
Questions about hippo_outlier_summary
FORGIA #330 — Round 48: top N outlier episodes with. 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_outlier_summary: 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_outlier_summary 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_outlier_summary 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_outlier_summary. 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_outlier_summary 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.
More on Verimem, and thousands of servers like it.
This server
Across the catalogue