sandbox_template_snapshot
Capture a PREPARED running sandbox (deps installed, seeds written, bootstrap done) ONCE as a reusable DERIVED TEMPLATE keyed by (key, hash), without stopping it. From then on sandbox_create with the same templateKey+templateHash boots a box with that bootstrap already done, in the time of a norma...
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What sandbox_template_snapshot does on EasyBits
AI agents call sandbox_template_snapshot to retrieve information from EasyBits without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why sandbox_template_snapshot is rated Low
Even though sandbox_template_snapshot only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Attacks that exploit this kind of access
The rule that runs sandbox_template_snapshot safely
PolicyLayer is an MCP gateway: it sits between your AI agents and EasyBits, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For sandbox_template_snapshot, this is the rule to start with:
sandbox_template_snapshot 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 EasyBits, apply this rule, and every sandbox_template_snapshot call is checked against it from then on.
Questions about sandbox_template_snapshot
Capture a PREPARED running sandbox (deps installed, seeds written, bootstrap done) ONCE as a reusable DERIVED TEMPLATE keyed by (key, hash), without stopping it. From then on sandbox_create with the same templateKey+templateHash boots a box with that bootstrap already done, in the time of a normal create (~24 ms + boot) — no snapshot-fork, no re-install. Idempotent: if (key, hash) already exists it returns reused:true and does not touch the box. Put in. It is categorised as a Read tool in the EasyBits MCP Server, which means it retrieves data without modifying state.
Register the EasyBits MCP server in PolicyLayer and add a rule for sandbox_template_snapshot: 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 EasyBits. Nothing to install.
sandbox_template_snapshot 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 sandbox_template_snapshot 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 sandbox_template_snapshot. 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.
sandbox_template_snapshot is provided by the EasyBits MCP server (@easybits.cloud/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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