mempool_tx_output_info

Provides detailed information for a single transaction output, including its value, spend status, and any attached metadata such as Ordinal inscriptions, Runes, or BRC20 data. In addition to confirmed transactions, mempool endpoints return data which reflects pending transactions in some number of

ServerMaestro MCP Server
CategoryRead

How to control mempool_tx_output_info ↓

WHAT IT DOES

What mempool_tx_output_info does on Maestro MCP Server

AI agents call mempool_tx_output_info to retrieve information from Maestro MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

THE RISK

Low Risk

Why mempool_tx_output_info needs a policy

This tool retrieves and queries blockchain transaction data (transaction outputs, values, spend status, metadata) without modifying, deleting, or executing any operations. It is a pure read operation on blockchain state, including pending mempool transactions. The data returned reflects the current state but does not alter it.

From the tool's definition Tool name 'mempool_tx_output_info' and description states it 'Provides detailed information' and 'return[s] data' about transaction outputs. No mutation, deletion, or execution capability described.

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

POLICY

How to control mempool_tx_output_info

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 mempool_tx_output_info:

policy.json

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

mempool_tx_output_info 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.

CAP THIS TOOL →

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EXPLORE

Related tools and policies

More Maestro MCP Server tools

Destructive EventManagerService_DeleteTrigger Remove a trigger Deletes a specific trigger identified by its unique \ Execute esplora_broadcast_transaction Broadcast a raw transaction to the network. The transaction should be provided as hex in t Execute rpc_submit_transaction Pushes a signed raw transaction to the network. Write EventManagerService_CreateTrigger Create a new trigger Adds a trigger to a manager to listen for specific blockchain activ Write EventManagerService_UpdateTrigger Update a trigger Allows modification of a trigger Read rpc_block_range_info Fetches basic info for a contiguous block range (start and end height). Read brc20_transfer_inscriptions_by_address Returns all unspent BRC20 transfer inscriptions residing at the address. This endpoint is Read activity_by_inscription Lists all transactions that have involved the given inscription, starting from its origin

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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 mempool_tx_output_info

What does the mempool_tx_output_info tool do? +

How do I enforce a policy on mempool_tx_output_info? +

Register the Maestro MCP Server MCP server in PolicyLayer and add a rule for mempool_tx_output_info: 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 mempool_tx_output_info? +

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

Can I rate-limit mempool_tx_output_info? +

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

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

mempool_tx_output_info 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.

CHECK YOUR STACK →

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117 Maestro MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.