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

The annotations already indicate readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is clear. The description adds that it shows platform and adapter versions, which is useful context, but it does not disclose any additional behavioral traits such as output format or whether network access is needed. Because annotations cover the main safety aspects, a score of 3 is appropriate.

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 with no unnecessary words. It front-loads the core functionality and is highly efficient, earning full marks for 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?

Although there is no output schema, the description tells the agent exactly what the tool returns (platform and adapter versions), which is sufficient for a simple version-check tool. It could have also mentioned the output format (e.g., text or structured data), but given the tool's simplicity and the absence of parameters, the description is largely complete. A score of 4 reflects the minor omission.

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 no parameters, so schema description coverage is 100% by default. The description does not need to explain any parameters. Per the rubric, a zero-parameter tool receives a baseline of 4, which is suitable here.

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 uses a specific verb 'show' and identifies the exact resource ('current MCP platform and adapter versions'). It clearly distinguishes this from other sibling tools like authenticate or connect, which serve different purposes such as authentication or querying environmental data.

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 mention of when to use this tool versus alternatives, no preconditions, and no exclusions. The description states only what the tool does, leaving the agent to infer that it is for checking versions. No explicit guidance is provided.

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