hippo_recall_chain
FORGIA #248 — lightweight recall + forward orchestrator.
This record as markdown: /tools/verimem/hippo-recall-chain.md
What hippo_recall_chain does on Verimem
AI agents call hippo_recall_chain 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_recall_chain is rated Low
This tool retrieves or orchestrates recall of information from the memory system. It has no capability to modify, delete, or execute external operations. The 'forward orchestrator' aspect suggests coordination/routing of recall operations, which remains within the read category.
From the tool's definition Tool name 'hippo_recall_chain' and description 'lightweight recall + forward orchestrator' indicate retrieval and coordination of memory data. The term 'recall' in the context of a bi-temporal memory engine means querying/retrieving stored information.
Attacks that exploit this kind of access
The rule that runs hippo_recall_chain 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_recall_chain, this is the rule to start with:
hippo_recall_chain 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_recall_chain call is checked against it from then on.
Questions about hippo_recall_chain
FORGIA #248 — lightweight recall + forward orchestrator. 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_recall_chain: 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_recall_chain 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_recall_chain 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_recall_chain. 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_recall_chain 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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