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

With no annotations, the description carries the full burden. It discloses that it returns a basket_token and instructs to treat it as a secret, adding valuable context beyond the empty schema. It doesn't mention error conditions or state persistence, but for a simple create operation this is adequate. The token secrecy note is a helpful behavioral detail.

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 extremely concise: two sentences with no filler. It front-loads the purpose and immediately follows with the essential return token instruction. Every word earns its place.

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 tool with no parameters, no output schema, and simple semantics, the description covers all needed information: what it does, what it returns, and how to use the result. The token secrecy warning is a nice addition. Nothing essential is missing.

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?

There are zero parameters, so the schema covers everything trivially. The description doesn't need to explain parameters. Per the baseline for 0 params, a score of 4 is appropriate.

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 a clear verb and resource: 'Create a new basket.' It distinguishes from siblings (add, remove, view, etc.) by being the only creation tool for baskets, and it's unambiguous. The purpose is immediately obvious.

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?

It implicitly conveys when to use it: before other basket/checkout tools, by requiring the returned basket_token to be passed to them. It doesn't explicitly say 'use this first' but the instruction to 'keep it and pass it to every basket and checkout tool' strongly implies it as the initial step. It doesn't mention alternatives, but none are relevant since it's the only creation tool.

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