AI agents call get_deployment_preview to retrieve information from Yocoolab without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a query/lookup operation to determine if a preview deployment exists and returns a URL. It has no side effects, does not create, modify, delete, or execute code. The operation is purely informational and read-only, consistent with the Read category for data retrieval tools.
From the tool's definition Tool name 'get_deployment_preview' and description 'Check if a preview deployment is available' and 'Returns the preview URL' indicate a read-only query operation that retrieves status and URL information without modifying any data.
Attacks that exploit this kind of access
Check if a preview deployment is available for a specific repo and branch. Returns the preview URL if deployed. Useful after creating a PR to get the live preview link. It is categorised as a Read tool in the Yocoolab MCP Server, which means it retrieves data without modifying state.
Register the Yocoolab MCP server in PolicyLayer and add a rule for get_deployment_preview: 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 Yocoolab. Nothing to install.
get_deployment_preview 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 get_deployment_preview 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 get_deployment_preview. 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.
get_deployment_preview is provided by the Yocoolab MCP server (yocoolab/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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