hippo_facts_cluster_by_topic
FORGIA #279 — cluster facts by topic. Returns per-topic
This record as markdown: /tools/verimem/hippo-facts-cluster-by-topic.md
What hippo_facts_cluster_by_topic does on Verimem
AI agents call hippo_facts_cluster_by_topic 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_cluster_by_topic is rated Low
This tool organizes and returns existing facts grouped by topic—a pure data retrieval and analysis operation. It has no side effects, does not modify state, does not execute code or commands, and does not involve financial transactions. The highest risk would be information disclosure if the clustered facts themselves were sensitive, but the operation itself is a read-only analytical action.
From the tool's definition Tool name 'hippo_facts_cluster_by_topic' and description 'cluster facts by topic. Returns per-topic' indicate a retrieval and grouping operation with no modification, deletion, or execution of external systems.
Attacks that exploit this kind of access
The rule that runs hippo_facts_cluster_by_topic 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_cluster_by_topic, this is the rule to start with:
hippo_facts_cluster_by_topic 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_cluster_by_topic call is checked against it from then on.
Questions about hippo_facts_cluster_by_topic
FORGIA #279 — cluster facts by topic. Returns per-topic. 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_cluster_by_topic: 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_cluster_by_topic 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_cluster_by_topic 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_cluster_by_topic. 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_cluster_by_topic 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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