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

The description is consistent with the annotations (readOnlyHint=true, idempotentHint=true, destructiveHint=false). It adds no behavioral details beyond what annotations already declare, such as output format or whether any side effects occur. Since annotations cover the safety profile, the description meets the minimum bar but does not enrich behavioral understanding.

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, front-loaded sentence that delivers the complete purpose without any fluff. Every word contributes to clarity, and it is perfectly sized for a simple tool.

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, clear read-only metadata), the description is adequate for an agent to understand its function. However, it does not specify the format of the returned version information (e.g., string, object, individual fields), which could be useful if the agent needs to parse the output. This minor omission prevents a perfect score.

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, so according to the rubric, the baseline is 4. The description correctly implies no inputs are needed. No additional parameter semantics are required because there are none.

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: to show current MCP platform and adapter versions. It uses a specific verb ('show') and resource ('versions'), which is unambiguous. However, it does not explicitly differentiate from sibling tools like toolkit_info, which might provide similar information, though the description's specificity reduces confusion.

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 no guidance on when to use this tool versus alternatives. It simply states what it does, leaving the agent to infer usage context. There is no mention of exclusions or comparisons to sibling tools, which is a clear gap for a tool that could potentially overlap with toolkit_info.

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