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orancummins

Open Finance US MCP

by orancummins

get_customer_transactions

Retrieve transaction history for a customer across all their accounts within a specified date range using epoch seconds.

Instructions

Get transactions across all of a customer's accounts. Dates are epoch seconds.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
limitNo
startNo
to_dateYes
from_dateYes
customer_idYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
okYesTrue when the upstream HTTP status was < 400.
dataNoFinicity's native response body.
errorNoError summary when ok is False.
status_codeYesUpstream Finicity HTTP status code.
Behavior2/5

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

No annotations provided; description only mentions date format (epoch seconds) but omits behavioral traits like pagination handling, rate limits, or return structure beyond basic function.

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

Conciseness4/5

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

Two concise sentences with no extraneous information. Could be slightly more structured but is efficient.

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

Completeness2/5

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

Given 5 parameters, no annotations, and presence of output schema, description is too sparse. Lacks details on pagination, sorting, or response format that would aid effective use.

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

Parameters2/5

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

Schema coverage is 0%, and description only adds date format context for from_date and to_date. Does not explain limit, start, or customer_id. Fails to compensate for 5 undocumented parameters.

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 verb 'Get' and resource 'transactions across all of a customer's accounts'. It distinguishes from sibling tools like get_account_transactions which likely target a single account.

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?

Implies usage for fetching all transactions across accounts, contrasted with per-account siblings, but no explicit when-to-use or when-not-to-use guidance.

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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