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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and non-openWorld, so the safety profile is fully covered by structured data. The description adds that this is a pure computation returning volume and surface area, but that return information duplicates the existing output schema, so added value is modest.

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?

Three compact sentences, formula front-loaded and return values trailing; nothing is padded. The size is appropriate for the tool's simplicity.

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 trivial two-param calculator with full schema coverage, generous annotations, and an output schema, little prose is needed — but the phantom slant parameter and the base-area/base-length terminology mismatch leave a real possibility of incorrect invocation.

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 coverage is 100% and the schema documents exactly two params (base_length, height), but the description describes inputs as "base area" and an "optional slant for surface area" — the slant parameter does not exist and "base area" misnames base_length. This actively misleads an agent about the call signature.

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 with the exact formula (V=(1/3)·base_area·height), so an agent immediately knows this computes pyramid volume. However, it offers no differentiation from closely related siblings such as calculate_cone, calculate_volume, or calculate_sphere beyond a vague pointer to list_bundles.

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?

"Use for geometry or architecture" implies a domain but gives no explicit when-to-use conditions, no when-not, and no named alternative among the many geometry calculators in the sibling list. Usage must be inferred.

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