paypal_invoices

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

No annotations are present, so the description must fully convey behavioral traits. It only lists actions (list, create, send) without disclosing side effects, authentication requirements, idempotency, or error behavior. Critical information about write operations is omitted.

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, which is concise but lacks structured information. It does not front-load the most important details (e.g., that action determines parameter requirements). It is functional but could be more efficient and informative.

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?

With 8 parameters, no output schema, and complex actions (create/send), the description is incomplete. It fails to mention parameter dependencies, pagination, or sandbox mode. The tool's capabilities are underdescribed for an AI agent to use correctly.

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 38%, yet the description adds no meaning beyond the schema. It does not explain the 'invoice' object structure, the relationship between 'action' and required parameters ('invoice_id' for send, 'invoice' for create), or pagination ('page', 'page_size') and sandbox usage.

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 'List, create, or send PayPal invoices' clearly states the verb and resource, listing three distinct actions on invoices. It distinguishes from sibling tools like 'paypal_orders' which handle orders.

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 guidelines are provided on when to use this tool versus alternatives, such as 'paypal_orders' or other payment tools. No prerequisites, context, or exclusions are mentioned.

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