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

Annotations already provide readOnlyHint=false and destructiveHint=false, so the description needs only to add context. It adds 'before checkout' as timing and lists editable fields, but does not mention state requirements, whether updates replace prior values, or whether a checkout modifies the quote.

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 one front-loaded sentence with no filler. It uses the fewest words possible to convey action, target fields, and lifecycle timing, and every phrase in the sentence adds value.

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?

Given the available rich schema, enums, output schema, and annotations, this description is adequate for call selection and invocation. 'Before checkout' anchors the operation in the correct workflow; the only missing piece is explicit guidance about when to choose this over creating a new quote, but the schema already states the prerequisite of an existing quoteId.

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 100%, and each parameter already carries rich descriptions such as UUID provenance and source of materialId. The description only paraphrases field names and does not add new parameter meaning beyond the 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 uses a specific verb and resource: 'Update quantity, material, production speed, or fulfillment' clearly identifies a quote mutation action. While it distinguishes itself enough from create/checkout via the term 'Update', it does not explicitly name or contrast sibling 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?

The phrase 'before checkout' provides useful lifecycle context and implies a relationship with printing.checkout.create. However, it does not explicitly say when not to use the tool or name an alternative such as printing.quotes.create or printing.quotes.get.

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