CreateWalls

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

Annotations already declare readOnlyHint=false, destructiveHint=true, and openWorldHint=false, so the safety profile is covered. The description adds nothing beyond that - it does not disclose that wallsData is a batch array, what happens on partial failure, or what the caller receives back after creation.

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?

Two very short sentences that are front-loaded with the action. The '(Tapir, Element Commands)' tag is mildly noisy but does hint at the command namespace, so it is not pure waste.

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?

This is a complex batch-mutation tool with many optional geometry, story, and material fields and no output schema. The description says nothing about return values (e.g. whether created element IDs come back), error behavior, or required context, which is far too thin for the tool's complexity.

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?

The single top-level parameter (wallsData) has zero schema-level description and the tool description offers no explanation of it either. While several nested fields carry their own schema descriptions, the description should compensate for the top-level coverage gap by explaining the batch shape and required sub-fields, and it does not.

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 and resource ('Creates Wall elements'), so the agent immediately knows the operation type. However, 'based on the given parameters' is filler and the description does nothing to distinguish this from sibling creators such as CreateSlabs, CreateColumns, or CreateZones.

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 guidance on when to use this tool rather than the other creation tools, no prerequisites (e.g. valid story index, attribute IDs), and no mention of whether walls can be batched or must be created one at a time. The agent is left to infer everything from the schema.

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