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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, covering the safety profile. The description adds no additional behavioral context such as response format, potential errors, or side effects. It is consistent with annotations and does not contradict them, but it adds no extra transparency beyond what annotations already provide.

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 sentence: 'Show the current MCP platform and adapter versions.' It is concise, front-loaded with the action, and contains no redundant or extraneous information. Every word earns its place.

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 simple version-information tool with no parameters and good annotations, the description is largely sufficient. It does not specify the return format (e.g., JSON structure), but this is a minor omission given the tool's simplicity and the clarity of 'versions.' An output schema is absent, so a bit more detail on the response could be helpful, but it does not detract significantly from completeness.

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 schema coverage is 100% and there is nothing to describe. Per the rubric, 0 parameters warrants a baseline of 4. The description correctly does not mention parameters, but also offers no supplementary guidance on inputs (none exist). This 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 function: 'Show the current MCP platform and adapter versions.' The verb 'Show' and the resource 'MCP platform and adapter versions' are specific and unambiguous. It is easily distinguished from sibling tools like 'authenticate' or 'report_bug', which serve different purposes.

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 the tool is used when version information is needed, but it does not explicitly state when to use it versus alternatives or not to use it. For example, it doesn't mention that 'toolkit_info' might serve a similar purpose or any exclusions. This is acceptable but minimal—leaves usage context implicit.

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