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

Annotations declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, which fully cover the tool's safety profile. The description adds no new behavioral context beyond what annotations already provide, but given the simple nature of a read-only version checker, this is acceptable. No contradiction.

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, succinct sentence with no wasted words. It is appropriately front-loaded and perfectly sized for a zero-parameter 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 zero parameters, complete annotations, and a clear one-sentence description, the tool is well-specified. The only minor gap is the lack of a note on output format, but the description already highlights the content scope (platform and adapter versions).

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 there is nothing to document. The description's mention of 'MCP platform and adapter versions' clarifies the output granularity, which is helpful since there is no output schema.

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 tool's purpose with a specific verb and resource. It is distinguishable from siblings like 'toolkit_info' which likely provides broader information, and no other sibling seems to focus on version display.

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 usage for checking versions, which is clear given the tool's simplicity and the absence of complex context. However, there is no explicit guidance on when to use this tool over siblings like 'toolkit_info' or 'show_version' vs other informational tools.

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