stripe_customers_create

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

Annotations only declare readOnlyHint=false and openWorldHint=true, so the description must carry the rest. It says nothing about idempotency, whether the call is reversible, what permissions or API key scope are needed, or that a customer ID is returned and needed downstream (e.g., for checkout sessions or invoices).

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?

A single front-loaded sentence with zero waste. It is efficient, though its brevity reflects under-specification rather than disciplined conciseness, so it does not reach a 5.

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 a 10-parameter mutation with no output schema and only two coarse annotations, the description omits anything an agent needs beyond the schema: no return value, no error/idempotency behavior, no note that this is the prerequisite step for invoices, subscriptions, or checkout sessions.

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 100%, so every parameter (balance units, taxExempt enum values, paymentMethod create-only behavior) is already documented in the schema. The description adds no parameter meaning beyond that, so the baseline 3 applies.

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?

States a specific verb and resource ('Create a customer'), so the operation is unambiguous. However, it does nothing to distinguish this from the sibling linear_customer_create or to indicate which platform's customer model is being created, which a 5 would require.

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 when-to-use guidance, no prerequisites, and no mention of alternatives such as stripe_customers_retrieve or linear_customer_create. The agent must infer that this is the Stripe-side entry point for creating a customer record.

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