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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, so safety is clear. The description adds that it shows versions, but no additional behavioral details like output format or side effects. Since annotations cover the main behavioral traits, a 3 is appropriate as the description provides minimal extra context beyond what is already declared.

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 one short sentence with zero waste. It front-loads purpose clearly and nothing else. Perfectly concise.

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 simple tool with no parameters, no output schema, and strong annotations, the description is sufficient. It tells the agent exactly what it does. The only minor gap is not specifying what the returned information includes (e.g., raw text or JSON), but without an output schema, the description could be slightly more explicit. However, for a version tool, this is adequate. Score 4.

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 0 parameters, and schema description coverage is 100% (empty schema). The description does not need to explain parameters because there are none. Baseline for 0 params is 4, and the description adds no unnecessary param info. This is appropriate.

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 what the tool does: 'Show the current MCP platform and adapter versions.' The verb 'Show' is specific and the resource (versions) is identified. It distinguishes itself from siblings which include authentication, connection, marketplace, etc. The title 'Show Version' reinforces it. No ambiguity.

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 tool is self-explanatory and typically used for diagnostics. The description does not explicitly state when to use it vs alternatives, but given it's a version query tool, the context is clear. No exclusions or alternatives needed. However, it could have mentioned that it's useful for checking compatibility, but that's a minor gap. Score 4 for clarity without explicit guidelines.

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