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

Annotations already mark it readOnlyHint=true, so no safety contradictions exist. The description adds some useful context by saying the output covers protocol changes and gained modules, but it does not go into details like return format or whether the comparison is version-ordered. Neutral and adequate, though not rich.

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?

One sentence, front-loaded with the verb 'Compare' and the resource 'two OCPI versions', followed by exactly the useful specifics. No filler or redundant phrasing.

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 low-complexity, read-only comparison tool with two well-described enum parameters, the description names the input and the nature of the result. It does not detail the exact output format, but no output schema exists and the context is simple enough that this is a minor gap.

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%: both 'from' and 'to' have descriptions with examples and allowed enum values. The description does not need to add parameter-level meaning, so the baseline of 3 applies.

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 clearly states the tool's verb ('compare') and resource ('two OCPI versions'), and clarifies what the comparison entails: protocol changes and modules ChargerDojo gained. This distinguishes it from sibling tools that list or get individual versions.

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?

The description provides clear context for when to use the tool: any time an agent needs a comparison between two OCPI versions. It does not explicitly mention when not to use it or route to an alternative, but the 'compare' framing is unambiguous enough in the context of the siblings.

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