hippo_contradictions_scan
Cycle #110.B (2026-05-16). Run a contradiction scan over
This record as markdown: /tools/verimem/hippo-contradictions-scan.md
What hippo_contradictions_scan does on Verimem
AI agents call hippo_contradictions_scan 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_contradictions_scan is rated Low
Scanning for contradictions is a read-only operation that retrieves and analyzes existing data to detect logical conflicts. It has no side effects on the data itself—it merely examines and reports findings. The low severity reflects that misuse would expose information or incorrect analyses, but cannot corrupt, delete, or execute arbitrary operations.
From the tool's definition Tool name 'hippo_contradictions_scan' with action verb 'scan' indicates a query/inspection operation. Description fragment 'Run a contradiction scan over' suggests an analytical read operation that identifies inconsistencies without modifying state.
Attacks that exploit this kind of access
The rule that runs hippo_contradictions_scan 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_contradictions_scan, this is the rule to start with:
hippo_contradictions_scan 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_contradictions_scan call is checked against it from then on.
Questions about hippo_contradictions_scan
Cycle #110.B (2026-05-16). Run a contradiction scan over. 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_contradictions_scan: 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_contradictions_scan 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_contradictions_scan 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_contradictions_scan. 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_contradictions_scan 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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