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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is well covered. The description adds no new behavioral context, but with such strong annotations, the burden is lower. It provides the minimal necessary transparency for a read-only 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, concise sentence that states what the tool does without any redundancy. It is perfectly front-loaded and every word earns its place.

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's simplicity (no parameters, no output schema, strong annotations), the description is adequately complete. It tells the agent what the tool returns (platform and adapter versions) and nothing else is needed. It could be argued that it doesn't specify the exact format of output, but that's not critical for selecting and invoking this 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?

The tool has zero parameters and schema description coverage is 100%, so there are no parameter semantics to explain. The baseline is 4 for a no-parameter tool, and the description adds what can be expected from the output (platform and adapter versions), which is sufficient.

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 shows current MCP platform and adapter versions, using a specific verb and resource. It distinguishes itself from siblings like authenticate, connect, and toolkit_info, though it could be more explicit about the exact output format.

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 it's a simple version-information tool to be used when the user wants to know environment versions. However, it does not provide explicit when-to-use or when-not-to-use guidance or mention alternatives, though given its simplicity this is acceptable but not outstanding.

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