Reads DESIGN.md or uses sdd_scan_codebase results to detect the tech stack, then generates a Dockerfile and optionally a docker-compose.yml. Supports multi-stage builds for smaller production images.
AI agents use sdd_generate_dockerfile to create or update resources in Specky — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Specky environment.
This tool creates new configuration files (Dockerfile, docker-compose.yml) based on codebase analysis. While generation is reversible (files can be deleted or overwritten), the tool is fundamentally a Write operation that produces new persistent artifacts.
From the tool's definition Tool 'generates a Dockerfile and optionally a docker-compose.yml' — these are file creation operations that produce new artifacts. The description indicates 'generates' (creating new structured files) rather than executing or deleting.
Documented attack patterns abuse exactly the kind of access sdd_generate_dockerfile gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Specky, and nothing reaches the server without passing your rules. This is the rule we recommend for sdd_generate_dockerfile:
{
"version": "1",
"default": "deny",
"tools": {
"sdd_generate_dockerfile": {
"limits": [
{
"counter": "sdd_generate_dockerfile_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}sdd_generate_dockerfile stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Reads DESIGN.md or uses sdd_scan_codebase results to detect the tech stack, then generates a Dockerfile and optionally a docker-compose.yml. Supports multi-stage builds for smaller production images. It is categorised as a Write tool in the Specky MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Specky MCP server in PolicyLayer and add a rule for sdd_generate_dockerfile: 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 Specky. Nothing to install.
sdd_generate_dockerfile is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the sdd_generate_dockerfile 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 sdd_generate_dockerfile. 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.
sdd_generate_dockerfile is provided by the Specky MCP server (paulasilvatech/specky). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Specky, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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56 Specky tools catalogued and risk-classified — across an index of 43,000+ MCP servers.