Get Version Info

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

The annotations already declare this as a safe, read-only, idempotent, non-destructive operation. The description adds useful behavioral context by explaining that it returns the running PyPI version and the QRZ XML/Logbook API contract in use, which supports drift detection beyond what annotations provide.

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 front-loaded with the core purpose, followed by return details and then the operational use case. All three sentences earn their place and there is no redundant or filler text.

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?

For a zero-parameter, read-only version tool with rich annotations and an output schema, the description provides everything an agent needs: what version data is returned and why it matters. No additional authentication, pagination, or side-effect details are necessary for 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, so the baseline is 4. The description correctly does not invent parameter semantics, and the empty schema is sufficient for a no-argument version-info call.

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 and resource: it gets the qrz-mcp service version and upstream QRZ API version. It also explicitly states the two returned values, service_version and spec_version, making the tool's output distinguishable from all QRZ data lookup siblings.

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?

It gives a clear usage context: confirm fleet alignment across MCP deployments by comparing service_version and spec_version across servers to detect drift. It does not name when not to use the tool or alternatives, but no sibling appears relevant for version comparison, so the guidance is clear without exclusions.

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