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

With no annotations, the description carries the full behavioral burden, yet it discloses nothing about whether the conversion is decimal (1 GB = 1000 MB) or binary (1 GiB = 1024 MiB), rounding/precision, or output format. For a conversion tool these are the key behavioral facts and none are present.

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 short sentence with the action front-loaded and no filler; appropriately sized for a trivial conversion, though it is so terse that it omits useful detail.

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 simple, low-risk conversion with no annotations and no output schema, the description is minimally adequate, but it leaves the decimal-vs-binary question and the role of the second parameter unresolved, which an agent might need to call 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?

Schema description coverage is 100%, so the baseline is 3. However, the schema labels are uninformative ('Gb to process', 'Value to process') and the description does nothing to disambiguate why two parameters exist or which one holds the value, so it adds no meaning over the schema.

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 does name a verb and resource ('Convert gb to mb'), so the function is identifiable, but it largely restates the tool name and adds no scope or distinction from the sibling x402-mb-to-gb beyond the direction implied by the name itself.

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 versus the sibling conversion tools (x402-mb-to-gb, x402-data-size, x402-units-convert) or on input format. Usage is only implied by the tool name.

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