get_last_orders

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

Since no annotations are provided, the description carries the full burden. It discloses that an authenticated Carrefour session is required and that a list of order details is returned, but it does not describe error behavior, empty results, or any potential side effects, leaving the tool's behavioral profile only partially specified.

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 two short sentences that immediately state the purpose and return type, with the authentication note placed in parentheses. Every phrase adds value and there is no redundancy or filler.

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 simple, zero-parameter read-only retrieval tool with no output schema, the description covers the essential context: what is retrieved, for whom, from where, and the required auth state. It omits minor details like how many orders are returned or their ordering, but these are not critical for this tool's simplicity.

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?

The tool has zero parameters and the schema is empty, so there are no parameter semantics to clarify. The description appropriately does not invent parameters, and the no-parameter baseline of 4 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?

The description uses a specific verb ('Retrieves') and clearly names the resource ('most recent orders for the authenticated user on Carrefour France'). It gives a precise scope and return type, though it does not explicitly contrast with sibling tools like get_orders to highlight what 'last' adds.

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 guidance is given on when to prefer this over get_orders or other order-related tools. The only contextual hint is the authentication requirement, which is a prerequisite rather than a usage-vs-alternative guideline.

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