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

With no annotations, the description carries the burden of disclosing behavior. It clearly indicates a read-only operation ('returns') and provides a directive for the agent to act on the result. No side effects or permissions are mentioned, but for a zero-parameter retrieval tool, this is reasonably transparent.

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 short but contains a duplicated sentence ('Returns the latest version of the Netfluid SKILL.md file' appears twice). This redundancy wastes space, though the overall length is acceptable. The structure is front-loaded but not 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?

For a zero-parameter tool with an output schema, the description is sufficient to understand the tool's purpose and the recommended follow-up action. It explains what to do with the returned version number, making it contextually complete.

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 no parameters, so there is nothing to document. The baseline of 4 applies, and the description does not need to add parameter details.

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 returns the latest version of the Netfluid SKILL.md file. The verb 'returns' plus the specific resource (SKILL.md file) makes the purpose unambiguous. It is distinct from all sibling tools, which focus on operations like accounts, payments, and wallets.

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 provides a clear usage instruction: update files if the version number is greater and refresh MCP tools. This implies when to use the tool (to check for updates) and what action to take afterward, though it does not explicitly describe alternative tools or exclusion conditions.

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