bytes_format

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

No annotations are present, so the description must disclose behavioral traits. It does mention the $0.001 USDC cost via x402, which is a useful payment trait, but it fails to describe any side effects, return values, or operational behavior. The tool remains a black box beyond the cost.

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, with two sentences. The first sentence is essentially a restatement of the name, while the second provides cost information. While concise, it lacks substantive structure and doesn't use the limited space to convey meaningful usage or purpose.

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?

Given no output schema, no annotations, and a generic params object, the description is completely inadequate for an agent to invoke this tool. It doesn't specify inputs, outputs, or how this differs from many sibling converter tools. The agent would have to guess or rely on external knowledge.

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 input schema has a single 'params' object with a generic description, providing no real semantic content. The description's 'bytes format' hint hints at the domain but doesn't explain what keys or values should be passed. With 100% schema coverage but placeholder text, the description adds little to clarify the actual parameters.

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 labels this as a 'Converters tool' and mentions 'bytes format', which suggests it deals with byte formatting or conversion. However, the exact operation is unclear—it doesn't state a specific verb like 'convert' or 'format' and doesn't specify what inputs are expected. It distinguishes from siblings only by the 'bytes' keyword, not by behavior.

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 versus alternatives like 'convert_units' or other converter tools. The only extra information is the cost, but no context about appropriate use cases or exclusions is provided.

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