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

The annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, establishing this is a safe, read-only operation. The description reinforces that by saying 'Show' (not 'change' or 'modify'). It adds no contradictory information and is fully aligned with annotations, which is sufficient for a simple version query.

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 superfluous words. It front-loads the action ('Show') and specifies the exact scope of information, making it extremely concise and structured appropriately.

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 has no parameters, no output schema, and is a simple informational read, the description is complete. It states what versions are returned, and the annotations cover safety. There is no missing information that would hinder correct usage.

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 the baseline is 4 per the rubric. The description doesn't need to elaborate on parameters, as there are none to explain. It adds value by stating what the output covers (platform and adapter versions), which helps the agent know what to expect.

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: showing the current MCP platform and adapter versions. It uses a specific verb ('Show') and identifies the resource (versions), which is distinct from siblings like authenticate or connect. It could be slightly more specific about what 'adapter' refers to, but the purpose is clear.

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 when to use it (when checking the environment/version), but it doesn't explicitly state exclusions or alternatives among siblings. Given no parameters and a simple informational purpose, the context is clear enough, though it could benefit from an explicit note like 'use when you need to verify compatibility or version details.'

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