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Mempool Space

by io.github.pipeworx-io
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Mempool Stats

mempool_stats
Read-onlyIdempotent

Current mempool size + tx count + total fees.

Input Schema

NameRequiredDescriptionDefault
networkNoWhich Bitcoin network. Defaults to mainnet — the real Bitcoin network, which is what "Bitcoin" means in an ordinary question. "bitcoin" and "btc" are accepted as aliases for mainnet.mainnet

Output Schema

NameRequiredDescriptionDefault
countNoNumber of transactions in mempool
vsizeNoTotal virtual size in vB
total_feeNoTotal fees in satoshis

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed3 schema fields changed
    • addedInput schema / properties / network / default
      Added value: +"mainnet"
    • addedInput schema / properties / network / description
      Added value: +"Which Bitcoin network. Defaults to mainnet — the real Bitcoin network, which is what \"Bitcoin\" means in an ordinary question. \"bitcoin\" and \"btc\" are accepted as aliases for mainnet."
    • addedInput schema / properties / network / enum
      Added value: +[
+  "mainnet",
+  "testnet",
+  "signet",
+  "liquid"
+]
  2. First observed

TDQS

A3.7/5.0
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already provide readOnlyHint and idempotentHint, so the description adds minimal behavioral context beyond stating the tool returns current statistics. No contradictions.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Description is a single, front-loaded sentence with no wasted words.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the simple nature of the tool and the presence of an output schema, the description sufficiently covers what the tool returns and its overall purpose.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema describes the single parameter with enum values and aliases. The description does not add meaning beyond what the schema provides, and schema coverage is 100%.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

Description clearly states the tool returns current mempool size, transaction count, and total fees. It is a specific verb+resource with a clear scope, and it is distinct from sibling tools like block_height or get_block.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance on when to use this tool vs alternatives (e.g., recommended_fees). No when-not or preconditions mentioned.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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