hippo_search

FORGIA #195. Keyword/substring search over episodes

SERVERVerimem SOURCEaureliocpr-ctrl/verimem

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/verimem/hippo-search.md

WHAT IT DOES

What hippo_search does on Verimem

AI agents call hippo_search 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.

RISK

Why hippo_search is rated Low

This tool searches memory episodes by keywords or substrings, which is a read-only retrieval operation. It has no side effects, does not create, modify, delete, or execute external operations. The low severity reflects minimal blast radius: misuse would retrieve information the agent already has context access to, but cannot cause data loss, financial harm, or execute arbitrary code.

From the tool's definition Tool performs "Keyword/substring search over episodes" — a query operation that retrieves data without modifying or deleting it.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs hippo_search 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_search, this is the rule to start with:

hippo_search Allowed

hippo_search is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "hippo_search": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Verimem, apply this rule, and every hippo_search call is checked against it from then on.

FAQ

Questions about hippo_search

What does the hippo_search tool do? +

FORGIA #195. Keyword/substring search over episodes. It is categorised as a Read tool in the Verimem MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on hippo_search? +

Register the Verimem MCP server in PolicyLayer and add a rule for hippo_search: 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.

What risk level is hippo_search? +

hippo_search is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit hippo_search? +

Yes. Add a rate_limit block to the hippo_search 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.

How do I block hippo_search completely? +

Set action: deny in the PolicyLayer policy for hippo_search. 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.

What MCP server provides hippo_search? +

hippo_search 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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