Get Instances Customers Bank Accounts By Id

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

Annotations already declare readOnlyHint, idempotentHint, and openWorldHint, so the safety profile is covered structurally. The description adds nothing beyond that — no note on what is returned, whether a missing ID yields 404, or whether the bank account is fetched live from an external rail (relevant given openWorldHint).

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?

Two words, front-loaded, zero waste — but the terseness is under-specification rather than efficiency. It is appropriately sized only in the sense that it says almost nothing.

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?

Three required path-style parameters, no output schema, and partially documented IDs mean the description should carry more weight. It does not explain the identifier format, error behavior, or the relationship between customer_id and the bank account, so an agent has gaps to fill by guessing.

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 coverage is only 33% — only customer_id has a description, while id and instance_id are documented solely by example/length constraints. The description does not compensate by explaining the required hierarchy (instance → customer → bank account) or the expected prefixed ID formats.

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?

"Retrieve Bank Account" restates the name/title rather than describing scope or behavior. It does not distinguish this single-item fetch from siblings like GetV1InstancesCustomersBankAccounts (list) or DeleteV1InstancesCustomersBankAccountsById.

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?

There is no guidance on when to use this versus the list endpoint, nor on prerequisites such as whether the customer must belong to the instance or an existing bank account ID format. The agent is left to infer everything from the URL-shaped name.

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