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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=false, which fully conveys the safety profile. The description adds a small behavioral detail: it reports both 'platform' and 'adapter' versions, which is slightly more specific than the title. However, it doesn't detail output format or potential side effects (though unlikely for a read-only tool). Since annotations carry the transparency burden, the description's modest addition is acceptable, not perfect.

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, clear sentence that fully explains the tool's purpose. It is appropriately short for a zero-parameter, trivially simple tool. No unnecessary words or repetition.

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 extreme simplicity (no params, no output schema, no side effects), the description provides complete context. It tells the user exactly what information will be displayed. There are no missing pieces for a version-information tool.

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?

With 0 parameters and 100% schema coverage, there is no parameter meaning to add. Per rubric, baseline is 4 when there are 0 params and schema covers everything. The description doesn't need to compensate for anything.

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 'Show the current MCP platform and adapter versions' clearly states the verb ('Show') and the resource ('MCP platform and adapter versions'). It is specific enough to distinguish itself from siblings like 'toolkit_info' and 'connect', though it does not explicitly contrast with them. The purpose is immediately understandable and unambiguous.

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 this tool (when needing version info) but does not explicitly state when NOT to use it or name alternatives. Sibling tools like 'toolkit_info' might overlap, but no guidance is given on choosing between them. This earns a baseline 'implied usage' score.

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