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

With no annotations, the description carries the full behavioral disclosure burden. It discloses the human-in-the-loop requirement, the kycRequired/kycUrl response condition, and that this is the only step the agent cannot complete itself. It could add idempotency or success behavior, but it covers the critical operational details.

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

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

The description is compact, front-loaded, and actionable. The minor redundancy between 'Create the banking profile' and 'Opens the banking profile' plus the stray 'Free.' line keep it from a perfect score.

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

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

For a one-parameter tool with no output schema, the description explains the key failure response and the human handoff, which is the core operational knowledge an agent needs. Success-side details are minimal but inferable from the tool's role as the foundation for other banking calls.

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

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

Schema description coverage is 100%, so the optional auth_token parameter is already fully documented. The description adds no further parameter-specific meaning, which matches the high-coverage baseline.

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

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

The description clearly identifies the tool as creating/opening the banking profile that all other banking calls depend on. This distinguishes it from sibling tools like create_banking_account and create_banking_recipient by establishing it as the foundational prerequisite.

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

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

It provides strong usage context: identity verification must happen first, the agent should hand the kycUrl to the human if needed, and then retry after they finish. It does not explicitly name alternative tools or when-not-to-use situations, so it stops short of the highest bar.

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