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Cofferline

by com.cofferline
OverviewDiscussionsAdmin

get_statement

Deterministic monthly statement derived from the append-only ledger — same period, same bytes. Auth required.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "wallet": "<wallet>",
      "period": "<period>"
    },
    "name": "get_statement"
  }
}

Input Schema

NameRequiredDescriptionDefault
formatNo'json' (default) or 'csv'
periodYescalendar month, YYYY-MM
walletYeswallet address

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observed

TDQS

A4/5.0
Behavior4/5

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

With no annotations, the description carries behavioral disclosure itself. 'Deterministic... same period, same bytes' discloses reproducibility, 'append-only ledger' implies no mutation, and 'Auth required' states the permission prerequisite.

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?

Two short sentences front-load the key behavior and add auth context. Every word contributes; no filler or repetition of schema fields.

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

Completeness4/5

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

For a low-complexity getter with three fully documented parameters and no output schema, the description is nearly complete: purpose, determinism, source, and auth requirement are present. It does not cover error/edge-case behavior, but that is less critical here.

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?

Schema coverage is 100% and the input schema already describes wallet, period, and format with defaults. The description adds context about determinism but no additional parameter-level meaning.

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 names a specific resource ('monthly statement') and a concrete behavior: it is derived deterministically from the append-only ledger. This clearly distinguishes get_statement from sibling get_balance/get_delegation/get_policy tools.

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

Usage Guidelines3/5

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

The description implies when to use it (when a reproducible monthly statement is needed) and notes that auth is required, but it does not explicitly state when not to use it or name alternatives among the many get_* siblings.

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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