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

Adds real behavioral context beyond annotations: a successful attach is not print-ready and is still team-checked, plus the two-step direct-upload flow and file-size range (50–200MB+). Annotations already cover the safety profile (non-readonly, non-idempotent, non-destructive), so this is valuable supplementary disclosure.

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?

Front-loads the core action and the 'not print-ready' caveat before the two usage paths. It is somewhat dense but each sentence carries actionable information; only minor tightening would help.

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 usefully references the returned fileUrl and fileId and explains how to chain into vivid_place_order. It covers the main complexity of the multi-step upload well, leaving only minor gaps about accepted formats/handling edge cases.

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 80%, so the schema already documents most parameters and baseline is 3. The description adds workflow meaning for sourceUrl and requestUpload (and the fileId finalisation step), but contentType and filename are only covered by 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?

States a specific verb+resource (attach artwork file or link to a signage order) and clearly scopes it to customer-provided files. It does not explicitly differentiate from close siblings like vivid_upload_artwork or vivid_order_artwork, so an agent must infer the split.

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?

Gives concrete routing: use sourceUrl as the 'easiest' path, and requestUpload:true for large files with no link. It also names vivid_place_order as the downstream consumer, but does not state when NOT to use it or contrast with sibling upload/order-artwork tools.

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