hippo_chain_validate
FORGIA #223 — validate a STRIPS skill chain. Given
This record as markdown: /tools/verimem/hippo-chain-validate.md
What hippo_chain_validate does on Verimem
AI agents call hippo_chain_validate 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_chain_validate is rated Low
Validation tools are read operations—they query and analyze data structures to report on conformance or correctness. There is no indication the tool executes the chain, modifies memory state, or has side effects beyond returning validation results. This fits the 'Read' category (query/analyze without side effects).
From the tool's definition Tool name and description indicate validation of a STRIPS skill chain: 'validate a STRIPS skill chain'. Validation is a read-only operation that checks structure and semantics without modifying or executing the chain.
Attacks that exploit this kind of access
The rule that runs hippo_chain_validate 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_chain_validate, this is the rule to start with:
hippo_chain_validate 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_chain_validate call is checked against it from then on.
Questions about hippo_chain_validate
FORGIA #223 — validate a STRIPS skill chain. Given. 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_chain_validate: 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_chain_validate 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_chain_validate 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_chain_validate. 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_chain_validate 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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