Builds Docker Compose service images and returns structured per-service build status.
AI agents invoke compose-build to trigger actions in Http. 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.
Docker image building is a code execution operation that compiles Dockerfiles and produces artifacts. While not immediately destructive (images can be deleted), the execution of arbitrary build contexts and commands in containers poses significant risks if an AI agent is tricked into building malicious images or building from untrusted sources.
From the tool's definition The tool 'compose-build' invokes Docker Compose service image building, which executes external operations (Docker build commands) whose effects depend on the service arguments provided.
Documented attack patterns abuse exactly the kind of access compose-build gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Http, and nothing reaches the server without passing your rules. This is the rule we recommend for compose-build:
{
"version": "1",
"default": "deny",
"tools": {
"compose-build": {
"limits": [
{
"counter": "compose-build_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}compose-build 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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Builds Docker Compose service images and returns structured per-service build status. It is categorised as a Execute tool in the Http MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Http MCP server in PolicyLayer and add a rule for compose-build: 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 Http. Nothing to install.
compose-build 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 compose-build 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 compose-build. 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.
compose-build is provided by the Http MCP server (@paretools/http). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Http, 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.
202 Http tools catalogued and risk-classified — across an index of 43,000+ MCP servers.