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

No annotations are provided, so the description carries the full burden, but it only states the obvious computation without explaining how dimensions are supplied, what formula is used, or what the output looks like. The empty input schema makes this particularly opaque.

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?

The description is extremely short and has no filler beyond the redundant 'Pyramid Surface:' prefix, which merely repeats the tool name. While concise, it is under-specified to the point of being minimally useful.

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 computational geometry tool with no input schema, no annotations, and no output schema, this description is deeply incomplete. It does not explain what inputs are needed, what assumptions are made, or what value will be returned, leaving an agent unable to invoke it correctly.

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 tool has zero parameters, so there is no parameter detail for the description to add. The schema already fully covers the parameter surface, and the baseline for zero-parameter tools is 4.

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?

The description 'Surface area of pyramid' simply restates the tool name x402-pyramid-surface with slightly different wording. It is essentially a tautology and does not differentiate this tool from siblings like x402-pyramid-volume or x402-cone-surface beyond what the name already implies.

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 or when to prefer an alternative. No mention is made of input requirements, the type of pyramid, or how this differs from related geometry tools in the sibling list.

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