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

Annotations already cover key behavioral aspects: readOnlyHint=true, destructiveHint=false, idempotentHint=true. The description adds no new behavioral details (e.g., what exactly is returned or whether network calls are made). Since the tool is trivial and annotations are strong, a 3 is appropriate: it doesn't contradict, but also doesn't add much beyond annotations.

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 conveys the tool's purpose efficiently. There is no unnecessary verbiage; every word earns its place. This is exemplary conciseness.

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 is extremely simple (no parameters, no output schema, strong annotations), the description is complete enough. The agent knows exactly what the tool does, and annotations cover safety/repeatability. There is nothing missing for effective use.

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?

This tool has no parameters, so the description doesn't need to explain any. The schema coverage is 100% trivially (empty properties). With zero parameters, the baseline is 4, and the description is adequate.

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 purpose: showing version information for the MCP platform and adapters. It uses a specific verb ('Show') and identifies the resource ('MCP platform and adapter versions'). While it doesn't differentiate from siblings, the siblings are unrelated, so no differentiation is needed; thus a 4 is appropriate.

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 when you need version information. It doesn't explicitly state when not to use it or mention alternatives, but given the tool is a simple getter with no parameters, minimal guidance is needed. Sibling tools like 'toolkit_info' could overlap, but without more context, a 3 is fair.

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