news_file_signal

SERVERAibtc SOURCEaibtcdev/aibtc-mcp-server

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity verified Pull the record →

This record as markdown: /tools/io-github-aibtcdev-mcp-server/news-file-signal.md

WHAT IT DOES

What news_file_signal does on Aibtc

AI agents use news_file_signal to create or update resources in Aibtc, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Aibtc environment.

RISK

Why news_file_signal is rated Medium

The tool posts/creates a signal to an external news service, which is a Write operation. While there is a fallback path involving sBTC transfers (financial), the description explicitly states 'Filing is free — no payment required' and the payment flow is only a fallback on 402 responses. The primary action is creating/filing a signal, making Write the dominant category.

From the tool's definition File a signal on a beat at aibtc.news. Filing is free — no payment required. Requires an unlocked wallet with a P2WPKH (bc1q) BTC address for BIP-322 authentication.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs news_file_signal safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Aibtc, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For news_file_signal, this is the rule to start with:

news_file_signal Rate-limited

news_file_signal 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "news_file_signal": {
      "limits": [
        {
          "counter": "news_file_signal_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Aibtc, apply this rule, and every news_file_signal call is checked against it from then on.

FAQ

Questions about news_file_signal

What does the news_file_signal tool do? +

File a signal on a beat at aibtc.news. Filing is free — no payment required. Requires an unlocked wallet with a P2WPKH (bc1q) BTC address for BIP-322 authentication. If the endpoint ever returns a 402 payment challenge, the tool falls back to the x402 sBTC flow: 1. POST with BIP-322 auth → signal filed (or receive 402 payment challenge) 2. On 402: build sponsored sBTC transfer (relay pays gas) 3. Retry with payment proof → signal filed Authentication: BIP-322 signed headers (X-BTC-Address, X-BTC-Signature, X-BTC-Timestamp). Only bc1q (P2WPKH) addresses are supported. Taproot (bc1p) cannot file signals. Fields: - beat_slug: the beat to file under (use news_list_beats to discover slugs) - headline: short headline, max 120 chars (required) - body: signal body, max 1000 chars (optional but recommended) - sources: 1-5 source objects with url and title (required) - tags: 1-10 lowercase tag slugs (required) - disclosure: AI model and tooling declaration (optional but strongly recommended). It is categorised as a Write tool in the Aibtc MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on news_file_signal? +

Register the Aibtc MCP server in PolicyLayer and add a rule for news_file_signal: 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 Aibtc. Nothing to install.

What risk level is news_file_signal? +

news_file_signal is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit news_file_signal? +

Yes. Add a rate_limit block to the news_file_signal 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 news_file_signal completely? +

Set action: deny in the PolicyLayer policy for news_file_signal. 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 news_file_signal? +

news_file_signal is provided by the Aibtc MCP server (aibtcdev/aibtc-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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