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

With no annotations, the description carries the full behavioral transparency burden, but it only says code is reviewed for bugs. It does not disclose side effects, safety, return format, model behavior, input limits, or anything beyond the obvious read-only intent.

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 short and front-loaded with the core purpose, but it is redundant: 'AI' and 'review' each appear twice in one sentence. The brevity reflects under-specification more than efficient structural design.

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?

There is no output schema and no annotation support, so the description alone should tell the agent what the result looks like and how the language parameter is used. It does neither. Given the large sibling set and adjacent AI/code tools, this is insufficient context for correct 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 description coverage is 100%, so the baseline is 3. The description adds no meaning beyond the schema's 'Code to process' and 'Lang to process'; it does not clarify what values 'lang' accepts or how it affects the review.

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 identifies a specific action ('Review code'), a resource ('code'), and a goal ('find bugs'), so an agent can grasp the core purpose. However, it does not distinguish this tool from closely related siblings such as x402-ai-diff-review, x402-code-diagnose, or x402-ai-code-explain, so it falls short of a 5.

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 about when to use this tool versus alternatives. The description simply restates the function and never mentions exclusions, prerequisites, or neighboring tools that an agent would need to consider for correct routing.

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