This record as markdown: /tools/io-github-dave-london-npm/trivy.md
What trivy does on Npm
AI agents invoke trivy to trigger actions in Npm. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.
Why trivy is rated High
This tool executes an external scanning process (Trivy) against potentially arbitrary targets including container images, filesystems, or IaC configurations. While it is read-like in intent (scanning/reporting), it actively runs an external program with side effects dependent on arguments, fitting the Execute category.
From the tool's definition Runs Trivy vulnerability/misconfiguration scanner on container images, filesystems, or IaC configs
Attacks that exploit this kind of access
The rule that runs trivy safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Npm, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For trivy, this is the rule to start with:
trivy stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Npm, apply this rule, and every trivy call is checked against it from then on.
Questions about trivy
Runs Trivy vulnerability/misconfiguration scanner on container images, filesystems, or IaC configs. Returns structured vulnerability data with severity summary. It is categorised as a Execute tool in the Npm MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Npm MCP server in PolicyLayer and add a rule for trivy: 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 Npm. Nothing to install.
trivy is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the trivy 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 trivy. 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.
trivy is provided by the Npm MCP server (Dave-London/Pare). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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