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

With no annotations, the description discloses key behaviors: the link is single-use, card gets tokenized on success, and future charges can be instant without 3D secure. It also mentions the return structure. It lacks details on errors, rate limits, or idempotency, but covers the main traits.

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 concise with seven short sentences, each adding value. It front-loads the main purpose and logically flows through the customer interaction, tokenization benefit, and single-use constraint. No wasted words.

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 the output schema exists, the description supplements it with return format and behavior. It covers purpose, parameters, and tokenization lifecycle. It is missing error scenarios and prerequisites, but for a two-parameter tool, it is largely 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 0%, but the description adds meaningful context for both parameters: wallet_fk and pin are identified as Netfluid wallet identifiers. This clarifies their role beyond the schema's type/requirement, though constraints (e.g., format) are not specified.

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 states 'Returns a 3D secure card payment link for a Netfluid wallet,' clearly identifying the tool's purpose. It explains the tokenization process, distinguishing it from other payment tools, but does not explicitly contrast with sibling tools like pay__subscription_with_wallet.

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?

The description implies usage by explaining that customers must open the link and complete the form, and that tokenized cards can be charged later. However, it does not explicitly state when to use this tool versus alternatives (e.g., direct wallet charge) or provide conditions for skipping it.

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