mcp_publish · SIN-Code MCP Server Builder Skill MCP

WHAT IT DOES

What mcp_publish does on SIN-Code MCP Server Builder Skill

AI agents invoke mcp_publish to trigger actions in SIN-Code MCP Server Builder Skill. 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.

WHY IT NEEDS A POLICY

Why mcp_publish needs a policy

Publishing a server typically triggers an external operation — uploading artifacts, registering with a registry, making the server discoverable — which is an irreversible or semi-irreversible external action. Given the sibling tools include 'mcp_register' separately, 'mcp_publish' likely packages and deploys/uploads the server to an ecosystem registry.

From the tool's definition Tool name 'mcp_publish' in a server that 'provides tools to register, publish, and audit servers'; description is empty.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

mcp_publish Rate-limited

mcp_publish 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "mcp_publish": {
      "limits": [
        {
          "counter": "mcp_publish_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches SIN-Code MCP Server Builder Skill, so you can run agents against it safely.

FAQ

Questions about mcp_publish

What does the mcp_publish tool do? +

mcp_publish. It is categorised as a Execute tool in the SIN-Code MCP Server Builder Skill MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on mcp_publish? +

Register the SIN-Code MCP Server Builder Skill MCP server in PolicyLayer and add a rule for mcp_publish: 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 SIN-Code MCP Server Builder Skill. Nothing to install.

What risk level is mcp_publish? +

mcp_publish is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit mcp_publish? +

Yes. Add a rate_limit block to the mcp_publish 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.

How do I block mcp_publish completely? +

Set action: deny in the PolicyLayer policy for mcp_publish. 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.

What MCP server provides mcp_publish? +

mcp_publish is provided by the SIN-Code MCP Server Builder Skill MCP server (opensin-code/sin-code-mcp-server-builder-skill). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.