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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered; the description's added value is disclosing the output artifacts are CSV spreadsheets and stat fields. It does not say whether files are written to disk or only returned, nor anything about size/rate limits. Helpful context, but not rich behavioral disclosure 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?

A single front-loaded sentence with no filler; the colon-separated artifact list is dense but every clause identifies a distinct output. Slightly long for one sentence, but nothing is redundant.

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 7-parameter tool with nested objects, a full input schema and an output schema, the description covers purpose and the produced artifacts, while the schema covers parameter wiring and the output schema covers return shape. The only gap is explicit sequencing guidance relative to the assembly nodes, which the schema partially supplies.

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 is documented in detail in the schema (including which node output to wire for products/errors/warnings and what the enzyme column means). The description adds only loose mapping between its listed artifacts and those inputs. With the schema doing the heavy lifting, baseline 3 is appropriate.

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 ('Build') and resource ('DnaCauldron's assembly report') and enumerates the concrete artifacts produced: the per-construct summary table, constructs and errors spreadsheets as pandas-compatible CSV, and Outcome / Number of assemblies stats. That is clearly distinguishable from siblings like verify_construct or export_construction_record. It stops short of naming an explicit alternative, but the artifact list makes the purpose unambiguous.

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?

Usage is only implied by the phrase 'from an assembly result' – an agent can infer it runs after an assembly node, and the schema descriptions reinforce this by telling the caller to wire the assembly node's `products`/`errors`/`warnings` outputs. However, the description itself gives no when-to-use-vs-alternatives guidance and no prerequisites or exclusions (e.g., when to use this instead of a raw export or verify_construct).

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