Preview template with sample data to check rendering
AI agents call preview_template to retrieve information from docxtpl MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The preview_template tool retrieves and displays template rendering output using provided sample data. This is a non-destructive, side-effect-free operation that queries how a template would appear. No data is created, modified, deleted, or irreversibly changed. No financial transactions or code execution (beyond safe template rendering) occurs. This is a straightforward Read operation.
From the tool's definition Tool name 'preview_template' combined with description 'Preview template with sample data to check rendering' indicates a read-only operation that displays how a template would render without modifying, deleting, or executing arbitrary code.
Attacks that exploit this kind of access
Preview template with sample data to check rendering. It is categorised as a Read tool in the docxtpl MCP Server MCP Server, which means it retrieves data without modifying state.
Register the docxtpl MCP Server MCP server in PolicyLayer and add a rule for preview_template: 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 docxtpl MCP Server. Nothing to install.
preview_template 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 preview_template 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 preview_template. 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.
preview_template is provided by the docxtpl MCP Server MCP server (z1w2r3/doc-mcp). 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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