Get Instances Customers Virtual Accounts

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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is fully covered. The description adds nothing beyond that — no note on pagination, result size, ordering, filters, or what happens when the customer has no virtual accounts — so it earns little credit above the structured hints.

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 two words long with zero waste, which is maximally concise, but the terseness crosses into under-specification rather than efficient front-loading. There is no structure to speak of and nothing to prioritize for the reader.

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 an open-world, idempotent read endpoint with no output schema, the description should at least indicate the shape of the return (a collection of virtual accounts scoped to a customer) and any pagination behavior. With rich annotations carrying safety, the missing pieces are about output and scoping, and neither is addressed.

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 only 50%: customer_id is documented while instance_id has no description at all. The description mentions neither required parameter, so it does not compensate for the gap — it gives no hint that both IDs are mandatory path-style identifiers with a 15-character fixed format.

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 states a verb ('Retrieve') and a resource ('Virtual Accounts'), so the general intent is inferable and the plural resource hints at a list operation. However, it does not establish scope (all virtual accounts for a given customer vs. a single account) nor differentiate from the adjacent GetV1InstancesCustomersVirtualAccountsById sibling, leaving the agent to infer from the tool name alone.

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 statement of when to use this tool versus the many siblings in the same namespace, including GetV1InstancesCustomersVirtualAccountsById, PostV1InstancesCustomersVirtualAccounts, and PutV1InstancesCustomersVirtualAccountsById. The agent must guess that the plural form means 'list' from naming conventions rather than from any explicit guidance.

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