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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, so the safety profile is well covered. The description adds the specific nature of the output (versions of platform and adapter), but doesn't go beyond that. Since annotations are comprehensive, a 3 is appropriate—the description adds value but no additional behavioral disclosure is needed.

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 a single, concise sentence that clearly states the purpose. There is zero waste—every word is necessary. It is front-loaded with the verb 'Show'.

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 the tool's simplicity (no parameters, no output schema), the description is complete. It tells the agent exactly what the tool does. It might benefit from mentioning the format of the output, but that's not required since there's no output schema. The annotations already cover behavioral aspects like idempotency and read-only.

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, and schema coverage is 100% (essentially no parameters). Baseline for zero params is 4, and the description doesn't need to explain parameters. It correctly focuses on what the tool returns, which is appropriate.

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 purpose: 'Show the current MCP platform and adapter versions.' It specifies the verb (Show) and the resource (versions), which is clear. However, it does not explicitly differentiate from sibling tools like 'toolkit_info' which might also provide version information, but it's still clear enough.

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 implies when to use it—when one needs to know the current versions of the platform and adapter. There is no explicit guidance on when not to use it or alternatives, but given the simplicity, it's adequate. The sibling 'toolkit_info' may also provide version info, but no distinction is made.

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