hippo_screen_content
Security screen for UNTRUSTED content before an agent trusts
This record as markdown: /tools/verimem/hippo-screen-content.md
What hippo_screen_content does on Verimem
AI agents call hippo_screen_content 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_screen_content is rated Low
This tool performs content analysis and validation—a read-only operation that retrieves information about content trustworthiness. It has no side effects, does not modify data, and does not execute arbitrary code or commands. The purpose is to inspect and assess content before an agent processes it further, which is fundamentally a read operation.
From the tool's definition Tool name 'hippo_screen_content' and description 'Security screen for UNTRUSTED content before an agent trusts' indicate the tool examines/analyzes incoming content for validation purposes without modifying data or triggering external operations.
Attacks that exploit this kind of access
The rule that runs hippo_screen_content 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_screen_content, this is the rule to start with:
hippo_screen_content 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_screen_content call is checked against it from then on.
Questions about hippo_screen_content
Security screen for UNTRUSTED content before an agent trusts. 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_screen_content: 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_screen_content 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_screen_content 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_screen_content. 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_screen_content 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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