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

The annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, signaling a safe, non-mutating operation. The description adds that it reports both platform and adapter versions, which is slightly more specific than the title. However, it doesn't disclose any other behavioral details like output format or potential side effects (e.g., network calls), but given the strong annotation coverage, the description adds marginal value beyond the 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, concise sentence that is front-loaded with the key verb and resource. It contains no filler, and every word contributes to understanding the tool's purpose. This is an example of effective minimalism.

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 (zero parameters, no output schema, strong annotations), the description is complete enough. It tells the agent what information this tool provides (platform and adapter versions). It doesn't specify the return format, but that's not critical for such a simple query tool, and the annotations cover safety aspects.

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 coverage is 100% (vacuously). The description explains that it shows versions of the MCP platform and adapters, which gives context about what the output will contain. Since there are no parameters, the description doesn't need to compensate for parameter semantics, and it provides some useful information about the tool's focus.

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 current versions of the MCP platform and adapters. It is specific enough (verb 'show' + resource 'versions') and distinct from siblings like 'toolkit_info' or 'marketplace' that might expose different metadata. However, it doesn't explicitly contrast with siblings, so it falls short of a perfect score.

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 a simple use case: checking versions when needed. It doesn't explicitly state when to use this tool vs others like 'toolkit_info' or 'connect', nor does it mention any context such as troubleshooting or compatibility checks. The guidance is minimal but not misleading, so a baseline score is appropriate.

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