Post Instances Payables

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

Annotations only say it is a non-read-only, open-world, non-destructive write; the description adds nothing about what actually happens when a payable is created, whether funds move immediately, or what state it lands in. The Idempotency-Key parameter exists but the description never tells the agent that retries need it, which is critical for a money-movement mutation.

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?

"Create Payable" is a single lean phrase with no wasted words, but its brevity is under-specification rather than genuine conciseness. There is nothing to front-load because nothing is said.

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?

This is a complex, nested, three-parameter write with no output schema, and the description does not say what is returned (a payable object with an id?) or what the caller must supply to succeed. For a tool whose requestBody includes line items, bank account routing, and scheduling, a four-word description leaves major gaps.

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 33%, so the description is expected to compensate, yet it mentions no parameters at all. The nested schemas carry some field-level descriptions (currency, taxes, discount, line_items, bank_account), but the description contributes zero meaning beyond them.

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?

"Create Payable" states a verb and resource, which does distinguish it from the Get/Delete payable siblings by name alone. But it is essentially a restatement of the tool name and title, with no scope, no mention of what a payable is, and no differentiation beyond the HTTP verb.

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 instead of PostV1InstancesPayouts, PostV1InstancesTransfers, or other money-movement siblings, and no prerequisites are stated. An agent must infer everything from the name.

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