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

Annotations declare destructiveHint=false and openWorldHint=true, covering the safety profile, and the description usefully adds that the result carries manual PayPal payment instructions. However, it does not disclose that this creates persistent server-side state requiring a valid businessId, nor any auth or idempotency behavior beyond what the write-oriented annotations imply.

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 short sentence with the action front-loaded and no padding. It is terse rather than verbose; the only cost is that its brevity reflects under-specification rather than efficient information density.

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 mutation tool with no output schema and 0% parameter documentation, the description should carry the full explanatory load, yet it omits parameter meaning, prerequisite state, and the shape of the returned payment instructions. What exists is a fragment of the picture.

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 description coverage is 0% and the description says nothing about either parameter. An agent cannot learn from this text what businessId identifies, whether it must be pre-existing, or what requestedCalls counts or its valid range, so the description fails to compensate for the empty schema.

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 verb and a resource ('Create a machine order'), but the resource conflicts with the tool name and title ('quote'/'purchase quote'), leaving the agent unsure whether a quote or an order is produced. It does not distinguish itself from siblings such as order_status or report_payment, which sit adjacent in the purchase flow.

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 statement of when to call this versus siblings like order_status or report_payment, and no prerequisites (e.g. needing a businessId that already exists). The phrase 'manual PayPal payment instructions' hints at a checkout context but the description never tells the agent where this fits in the flow.

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