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

Annotations declare readOnlyHint=true and destructiveHint=false, which would look contradictory against a 'create' name, but the description pre-empts that by stating it opens nothing by itself and only returns instructions. It also discloses the follow-up browser tooling and the notable constraint that no self-serve API key/onboarding exists, which is real context beyond the annotations.

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?

Three sentences, front-loaded with purpose and the critical 'opens nothing by itself' caveat before the handoff to cotlet_browser_* tools. The closing note on Paired's API documentation is somewhat tangential but still informs setup expectations.

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 description carries the return-value burden and does so by specifying step-by-step screens, buttons, and fields, plus the required follow-up tools. It leaves minor gaps around authentication/account resolution and how it relates to sibling purchase-order tools like paired_plus_receive_purchase_order.

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?

With zero parameters and 100% schema coverage, the baseline is 4. The description implicitly explains the empty schema by framing the tool as an instruction generator rather than an executor, though it never explicitly says why no order details (items, quantities, vendor) must be supplied.

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 a specific verb+resource (create a purchase order in the user's Paired Plus account) and immediately disambiguates the misleading name by stating it 'Returns how to do it in Paired Plus step by step ... and opens nothing by itself.' That resolves the apparent create-vs-read tension, though it does not differentiate itself from sibling create_* tools.

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 gives explicit sequencing: first call this to get screens/buttons/fields, 'then do it with the cotlet_browser_* tools in the user's Paired Plus Cloud Browser.' There is no when-not-to-use guidance or named alternative among the many paired_plus_create_* siblings, so it stops short of a 5.

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