CreateColumns

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

Annotations already declare readOnlyHint=false and destructiveHint=true, so the mutation profile is covered, but the description adds nothing beyond that - no note on permissions, batching semantics of the array, partial-failure behavior, or what the operation returns. It also fails to explain the 'Tapir' command context it references.

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 short clauses, front-loaded with the verb and resource. The phrase 'based on the given parameters' is filler, but the overall definition is tight and not padded.

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 destructive batch-create tool with a deep nested payload schema and no output schema, the description omits essential context: array batching behavior, duplicate/coordinate conflicts, required authoring mode, or what an agent gets back. The rich schema covers field-level detail, but the tool-level behavior is unexplained.

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 effectively 100%, with each sub-field of columnsData (depth, width, profileId, circleBased, etc.) thoroughly documented in the schema itself. The description adds no extra semantics over the schema, so the baseline 3 applies.

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 Column elements'), which is enough to separate it from sibling creators like CreateObjects, CreateZones, or CreateSlabs. However, it offers no explicit differentiation from those siblings beyond the noun, and the trailing '(Tapir, Element Commands)' is internal taxonomy rather than user-facing meaning.

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 description gives no when-to-use or when-not-to-use guidance and names no alternatives, despite a crowded sibling set of element-creation tools. An agent is left to infer that this is the column-specific path.

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