hippo_skills_aggregate_stats
FORGIA #275 — per-stage and per-status skill stats.
This record as markdown: /tools/verimem/hippo-skills-aggregate-stats.md
What hippo_skills_aggregate_stats does on Verimem
AI agents call hippo_skills_aggregate_stats 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_skills_aggregate_stats is rated Low
This tool retrieves statistical summaries about skills organized by stage and status. It performs no mutations, deletions, or external operations. The read-only nature of statistical aggregation, combined with the memory engine's role in retrieval and verification rather than modification, places this firmly in the Read category with low severity.
From the tool's definition Tool description indicates 'skill stats' aggregation, which retrieves and queries memory statistics across stages and statuses.
Attacks that exploit this kind of access
The rule that runs hippo_skills_aggregate_stats 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_skills_aggregate_stats, this is the rule to start with:
hippo_skills_aggregate_stats 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_skills_aggregate_stats call is checked against it from then on.
Questions about hippo_skills_aggregate_stats
FORGIA #275 — per-stage and per-status skill stats. 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_skills_aggregate_stats: 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_skills_aggregate_stats 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_skills_aggregate_stats 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_skills_aggregate_stats. 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_skills_aggregate_stats 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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