Scan a GitHub/GitLab repository for security vulnerabilities using Snyk. Requires the repository
AI agents invoke scan_repository to trigger actions in Snyk MCP Server. 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.
This tool executes an external security scan via the Snyk CLI against a remote repository. It does not merely read local data; it initiates an active operation (scanning) that involves fetching repository contents, running analysis pipelines, and potentially sending data to Snyk's cloud service.
From the tool's definition 'Scan a GitHub/GitLab repository for security vulnerabilities using Snyk' — triggers an external Snyk CLI operation against a remote repository
Documented attack patterns abuse exactly the kind of access scan_repository gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Snyk MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for scan_repository:
{
"version": "1",
"default": "deny",
"tools": {
"scan_repository": {
"limits": [
{
"counter": "scan_repository_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}scan_repository 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.
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Scan a GitHub/GitLab repository for security vulnerabilities using Snyk. Requires the repository. It is categorised as a Execute tool in the Snyk MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Snyk MCP Server MCP server in PolicyLayer and add a rule for scan_repository: 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 Snyk MCP Server. Nothing to install.
scan_repository 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 scan_repository 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 scan_repository. 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.
scan_repository is provided by the Snyk MCP Server MCP server (sammcj/mcp-snyk). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Snyk MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
4 Snyk MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.