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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds value beyond that by disclosing the auth requirement and the sort order ('newest first'), which the agent cannot infer from schema or annotations. It does not describe pagination or truncation behavior.

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?

Two tight sentences: the access prerequisite is front-loaded, then the payload contents. Every clause carries information, and there is no restating of the title or annotations.

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?

With no output schema, the field list ('number, date, status, total, items, tracking number and expected arrival') is exactly the return-value detail an agent needs, and the auth prerequisite is stated. The only meaningful gap is the undocumented limit/pagination behavior for a tool that could return many orders.

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 is one parameter (limit) with 0% schema description coverage and no mention in the description. The min/max/default constraints live in the raw schema, but neither source explains what limit controls (page size vs. total results) or what happens when it is omitted, so the description fails to compensate for the coverage gap.

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 specifies the resource precisely — the signed-in customer's orders — and enumerates the returned fields (number, date, status, total, items, tracking number, expected arrival), which clearly separates it from a generic order lookup. It stops short of an explicit verb ('list') and does not name the sibling it overlaps with, such as track_order, but the scope is unambiguous.

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 states a real prerequisite ('Requires signing in with a Deer account'), which tells the agent when the call can succeed. However, it gives no guidance on when to prefer this over track_order or get_my_account, and no note on how the limit/result-size affects usage.

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