list_invoices

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

Without annotations, the description only says 'List invoices' implying a read operation, but it fails to disclose pagination behavior, rate limits, or whether filters are exclusive or additive.

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 short sentence, making it concise, but the lack of structure (e.g., bullet points) could be improved for clarity when read alongside the schema.

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?

Even with an output schema available, the description omits essential behavioral context for a list operation, such as pagination defaults, ordering, or maximum results, making it incomplete.

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 description mentions filtering by job, customer, or creation date, which corresponds to three of five parameters, but ignores page and page_size entirely, and does not provide details on accepted 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?

The description clearly states the tool lists invoices and mentions filters, distinguishing it from unrelated tools but not explicitly from sibling list tools like list_estimates.

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?

No guidance is provided on when to use this tool versus alternatives such as get_invoice (singular) or other list tools, nor any exclusions or prerequisites.

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