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orancummins

Open Finance US MCP

by orancummins

generate_connect_url

Generate a hosted Data Connect URL for customers to securely link their financial accounts and enable open banking data access.

Instructions

Generate a hosted Data Connect URL for the customer to link accounts.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
experienceNo
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?

With no annotations, the description carries full burden but only states 'generates a URL'. It does not disclose side effects, authentication requirements, or what happens on failure. The behavioral insight is minimal.

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

Conciseness3/5

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

The description is a single sentence, making it concise. However, it sacrifices necessary detail, and the structure does not prioritize key information like parameters or sibling differentiation.

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 the existence of sibling tools and two parameters (one undocumented), the description is incomplete. It does not cover parameter semantics or usage context, and it fails to leverage the output schema.

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

Parameters1/5

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

Schema description coverage is 0%, yet the description does not mention any parameters. It fails to explain that customer_id is required or what the experience parameter controls. This is a critical gap.

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

Purpose4/5

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

The description clearly states the action ('generate') and the resource ('hosted Data Connect URL') with a purpose ('for the customer to link accounts'). However, it does not differentiate from sibling tools generate_lite_connect_url and generate_fix_connect_url, which have identical structure.

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 is provided on when to use this tool versus the similar siblings. Context signals indicate sibling tools for lightweight and fixing connect URLs, but the description offers no criteria for selection.

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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