get_client_token

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

No annotations provided, so description carries full burden. It mentions authentication requirement (X-AUTH-TOKEN) and gateway-agnostic nature. Does not disclose error handling, rate limits, or that the call is read-only (no side effects). Adequate but could be more thorough.

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?

Four sentences, no fluff, front-loaded with primary purpose. Every sentence adds value. Excellent structure.

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 2 parameters and no output schema, description covers purpose, usage flow, and parameter variations. However, does not specify return value format (e.g., string token) which could be helpful. Minor gap but overall complete.

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 coverage is 100% with descriptions. Description adds context: customerId scopes for customer vault and is required for PayFabric, optional for others. This goes beyond schema's basic description.

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?

Description clearly states verb 'get', resource 'gateway client credential', and purpose 'initialize payment integration and produce a paymentMethodNonce'. It distinguishes from related siblings like create_customer_payment_method.

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?

Explicitly describes the workflow: use returned value in hosted UI, then pass as paymentMethodNonce to create_customer_payment_method. Also notes gateway-agnostic nature and optional customerId scoping. Lacks explicit exclusions but usage is well-defined.

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