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

Annotations already declare readOnlyHint=true, destructiveHint=false, and idempotentHint=true, so the safety profile is well-established. The description adds that this covers both platform and adapter versions, which is useful behavioral context beyond the annotations. It doesn't mention any rate limits or side effects, but for a version display tool, this is sufficient.

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?

Direct, front-loaded single sentence. No extra information is included.

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 zero-parameter, no-output-schema read-only tool, the description is essentially complete. It could briefly mention an output example, but the cost of that is debatable. Given its simplicity, it is complete as-is.

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 of parameters is trivially 100%. The description accurately reflects that the tool needs no input, so there is no additional parameter semantics needed. The description fully compensates for the lack of parameters by clarifying what the tool outputs.

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 is clear and specific: it tells the agent the tool shows current MCP platform and adapter versions, which is a distinct purpose. It would benefit from explicitly distinguishing it from sibling tools like toolkit_info, but the verb+resource combination is clear enough for selection.

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: call this when you need version information. It does not explicitly mention when not to use it or compare against siblings like toolkit_info or report_bug, but given the simple nature of the tool and the presence of sibling alternatives, the implied usage is adequate though not exemplary.

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