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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is known. The description adds that it lists purchases with escrow statuses, but it does not disclose output structure, pagination behavior, or how orders are ordered.

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 brief and front-loaded with a [Buy] tag, making it easy to scan. The typo 'escup' and the lack of parameter details reduce its effectiveness, but it is still concise overall.

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 and two parameters, the description is too terse. It does not explain what information is returned per order, how limit affects results, or how openWorldHint (potentially incomplete world view) impacts the data. This leaves significant gaps for a listing tool.

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%, so the description must explain parameters. It only partially clarifies role by mentioning 'role=buyer' but does not explain the 'seller' or 'all' options, and limit is entirely unexplored. The schema provides enums but no descriptions, leaving the agent without guidance.

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 the specific verb 'List' with the resource 'purchases' and indicates role-based filtering ('buyer and/or seller'), which helps distinguish it from single-order tools like get_purchase. However, the typo 'escup statuses' instead of 'escrow statuses' slightly muddies the meaning.

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 provides a concrete usage hint ('Use role=buyer for buy workflow') but does not mention when to use buyer vs seller or all, nor does it contrast with alternative tools such as get_purchase for retrieving a single order.

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