tx_info_with_metaprotocols

THE RISK

Low Risk

Why tx_info_with_metaprotocols needs a policy

This tool queries and retrieves enhanced transaction and metaprotocol data from the Bitcoin blockchain without modifying, executing, or deleting anything. It is a straightforward read operation similar to block_info and other informational tools on the same server.

From the tool's definition Tool returns ("Returns an enhanced view") transaction information and metaprotocol metadata. The description contains no language indicating write, modification, execution, or destructive operations.

Documented attack patterns abuse exactly the kind of access tx_info_with_metaprotocols gives an agent:

POLICY

How to control tx_info_with_metaprotocols

PolicyLayer is an MCP gateway — it sits between your AI agents and Maestro MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for tx_info_with_metaprotocols:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "tx_info_with_metaprotocols": {}
  }
}

tx_info_with_metaprotocols is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

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

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EXPLORE

Related tools and policies

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about tx_info_with_metaprotocols

What does the tx_info_with_metaprotocols tool do? +

Returns an enhanced view of the transaction, including info about metaprotocols in both inputs and outputs. Useful for deep inspection tools. It is categorised as a Read tool in the Maestro MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on tx_info_with_metaprotocols? +

Register the Maestro MCP Server MCP server in PolicyLayer and add a rule for tx_info_with_metaprotocols: 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 Maestro MCP Server. Nothing to install.

What risk level is tx_info_with_metaprotocols? +

tx_info_with_metaprotocols is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit tx_info_with_metaprotocols? +

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

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

tx_info_with_metaprotocols is provided by the Maestro MCP Server MCP server (maestro-org/maestro-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Maestro MCP Server tool call.

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

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