Version

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

Annotations already declare readOnlyHint=true and openWorldHint=false, covering the safety profile. The description adds value by specifying what versions are returned (FreeCAD and bundled Python) and the source ('worker'), which is not in the annotations. No contradictions; the description is consistent with the read-only hint.

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, front-loaded sentence with zero filler. Every word contributes: it names the verb, the resources, and the source. No redundancy or unnecessary detail.

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 tool with no output schema, the description is complete. It tells the agent exactly what it will get (versions of FreeCAD and bundled Python). It does not specify the return format (e.g., string vs. structured object), but that is a minor gap for such a simple tool. The annotations cover safety, so nothing critical is missing.

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 there is nothing to explain beyond what the schema shows (an empty object). Baseline for 0 params is 4; the description does not need to add parameter details. It correctly omits any parameter info.

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 states a specific verb ('Return'), a specific resource ('FreeCAD and bundled Python versions'), and the source ('from the worker'). This clearly distinguishes it from sibling tools like ping or restart_worker, which serve different purposes. 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 trivial with no parameters, and there are no obvious alternative tools for retrieving version information. The description implicitly communicates when to use it (when versions are needed), and no exclusions are necessary. However, it does not explicitly state 'use this when you need to check versions,' but that is self-evident.

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