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

The description aligns with the annotations (readOnlyHint=true, idempotentHint=true, destructiveHint=false) — 'Show' correctly implies a non-destructive read operation. The annotations already cover the safety profile well, and the description adds the specific context that both platform and adapter versions are returned. The modest lack of additional behavioral detail (e.g., error cases) is acceptable given the tool's simplicity.

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?

A single sentence of 11 words, perfectly front-loaded with the core action. Every word earns its place, and there is zero redundancy or filler.

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, read-only version check with strong annotations and no output schema, the description is essentially complete. It provides the tool name and version context (platform and adapter) that an agent needs. One could imagine noting the exact version format or whether authentication is required, but these are minor gaps for such a simple 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 zero parameters and 100% schema coverage (trivially, an empty object), the baseline of 4 applies. There is nothing more the description could meaningfully add to explain parameter semantics since no parameters exist. The description correctly does not invent semantics that aren't there.

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' uses a specific verb ('Show') and resource ('MCP platform and adapter versions'). It clearly distinguishes itself from the sibling tools, none of which obviously relate to version information.

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?

There is no guidance on when to use this tool versus alternatives. While the purpose is clear, the description doesn't address when to prefer this over potentially overlapping tools like 'toolkit_info', nor does it provide any usage context. No exclusions or alternatives are mentioned.

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