Get User Billing State

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

The readOnlyHint and destructiveHint annotations already cover the primary behavioral aspect (safe, read-only operation). The description adds little beyond that, only hinting at the type of data returned without discussing side effects, errors, or data freshness, so it meets but does not exceed the baseline set by the annotations.

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 a single, clear sentence that conveys the purpose and scope without redundancy. It is appropriately brief for a parameterless getter, and the parenthetical provides useful detail without fluff.

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?

Given that no output schema is provided, the description serves as the primary source for understanding what the tool returns. It mentions key aspects (free availability, payment method status) but does not elaborate on possible values or formatting. This is slightly incomplete but sufficient for a simple query, especially with the sibling context clarifying the scope.

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?

The tool takes no parameters, and the schema accurately reflects that with 100% coverage. There is nothing ambiguous or undocumented, so the description needs no additional parameter explanation.

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 states the tool retrieves the user billing state, and the parenthetical ('free availability and payment method status') specifies exactly what information is included. This distinguishes it from similar tools like getAccountBilling and getWorkspaceBilling by focusing on the user level.

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?

The description does not indicate when to use this tool versus the closely related getAccountBilling or getWorkspaceBilling tools. It also mentions no preconditions or timing considerations, leaving the agent without guidance on tool selection among siblings.

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