publish-new-code-snippet

THE RISK

Medium Risk

Why publish-new-code-snippet needs a policy

This tool creates and posts new content (code snippets) to the Nostr network. It is reversible in that the published snippet could theoretically be deleted or replaced by the publisher, making it a Write operation rather than Destructive.

From the tool's definition Tool is named 'publish-new-code-snippet' with description 'Publish a new code snippet to Nostr'. The verb 'Publish' combined with 'new' indicates creation and posting of data to an external network.

Documented attack patterns abuse exactly the kind of access publish-new-code-snippet gives an agent:

POLICY

How to control publish-new-code-snippet

PolicyLayer is an MCP gateway — it sits between your AI agents and MCP-NOSTR, and nothing reaches the server without passing your rules. This is the rule we recommend for publish-new-code-snippet:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "publish-new-code-snippet": {
      "limits": [
        {
          "counter": "publish-new-code-snippet_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

publish-new-code-snippet 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.

Create a free account and register MCP-NOSTR — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

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EXPLORE

Related tools and policies

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Write publish Publish a tweet to Nostr Read fetch_snippet_by_id Fetch and display a snippet by its ID Read find_agents Find Roo agents with optional filtering by query Read find_instructions Find instructions with optional filtering by query Read find_snippets Find code snippets with optional filtering by author, language, and tags Read get_agent Get a Roo agent by event ID and save it to .roomodes file Read get_instructions Get an instruction by event ID Read list_snippets List code snippets metadata (without code content) with filtering by language and tags. Us

All 9 MCP-NOSTR tools →

Write tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about publish-new-code-snippet

What does the publish-new-code-snippet tool do? +

Publish a new code snippet to Nostr. It is categorised as a Write tool in the MCP-NOSTR MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on publish-new-code-snippet? +

Register the MCP-NOSTR MCP server in PolicyLayer and add a rule for publish-new-code-snippet: 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 MCP-NOSTR. Nothing to install.

What risk level is publish-new-code-snippet? +

publish-new-code-snippet is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit publish-new-code-snippet? +

Yes. Add a rate_limit block to the publish-new-code-snippet 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 publish-new-code-snippet completely? +

Set action: deny in the PolicyLayer policy for publish-new-code-snippet. 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 publish-new-code-snippet? +

publish-new-code-snippet is provided by the MCP-NOSTR MCP server (pablof7z/tenex-tools). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP-NOSTR tool call.

Start from MCP-NOSTR, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →