Last Look Back — Gate 1 preflight. Validates a structured mutation request: checks blacklist, resolves path, assesses tier, and issues an authorisation verdict. No disk mutation occurs — this is the pre-flight check only.
Risk signalsAccepts file system path (path)
Part of the Ternary Intelligence Stack server.
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AI agents call llb_validate to retrieve information from Ternary Intelligence Stack without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though llb_validate only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"llb_validate": {}
}
}See the full Ternary Intelligence Stack policy for all 34 tools.
These attack patterns abuse exactly the kind of access llb_validate gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Last Look Back — Gate 1 preflight. Validates a structured mutation request: checks blacklist, resolves path, assesses tier, and issues an authorisation verdict. No disk mutation occurs — this is the pre-flight check only.. It is categorised as a Read tool in the Ternary Intelligence Stack MCP Server, which means it retrieves data without modifying state.
Register the Ternary Intelligence Stack MCP server in PolicyLayer and add a rule for llb_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 Ternary Intelligence Stack. Nothing to install.
llb_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 llb_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 llb_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.
llb_validate is provided by the Ternary Intelligence Stack MCP server (rfi-irfos/ternlang). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 34 Ternary Intelligence Stack tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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