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

With no annotations present, the description carries the full burden, and it does disclose two useful traits: a hard cap of 50 results and newest-first ordering, plus implicit user scoping via "your". It says nothing about whether the result set is truncated when more than 50 orders exist, and gives no hint about the shape of a returned order.

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 nine-word sentence that front-loads the scope (50 most recent) and ends with the sort order. Nothing is wasted and nothing needs reordering.

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 zero-parameter read tool this is close to sufficient: the cap and ordering are stated, which is exactly the kind of detail agents otherwise guess wrong. The only real gap is that with no output schema and no annotations, the agent still has no idea what fields an order record contains.

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 takes zero parameters, so there is no semantic gap the description needs to close; the baseline of 4 applies. The note about 50 results and newest-first ordering is behavioral context, not parameter documentation.

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 names the resource (orders), the scope (your 50 most recent), and the ordering (newest first), so an agent knows exactly what it retrieves. It omits an explicit verb like "list" and doesn't name sibling alternatives, but the retrieval intent is unambiguous against create_order and get_order_status.

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?

There is no when-to-use guidance and no exclusion or alternative named. The closest sibling, get_order_status, is never referenced, so an agent must infer on its own that this tool is for browsing recent orders rather than fetching a specific one's status.

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