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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It conveys a read-only status check and mentions 'free,' but it does not describe the response format, possible side effects, authentication needs, or error behavior. For a no-annotation tool, this leaves meaningful gaps.

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 extremely concise: 'Check server status (free).' It is front-loaded, contains no filler, and every part adds value. The parenthetical 'free' provides useful context without bloating the description.

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, simple health-check tool, the description is mostly complete: an agent knows what action to take and why. The absence of an output schema means the return value's exact shape is unspecified, but the core purpose is clear enough for an agent to invoke the tool and interpret the result reasonably.

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 does not need to explain parameter semantics because there are none to explain. This is an appropriate non-issue for this tool.

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 and resource: 'Check server status.' This clearly distinguishes the tool from siblings like text.structure, timestamp, and uuid, which operate in completely different domains. The parenthetical 'free' adds a useful cost qualifier without obscuring the core purpose.

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?

Usage is implied by the description: use this tool to check server status. However, there is no explicit guidance about when to prefer it over alternatives or when not to use it, although the sibling tools are unrelated in function. A minimal level of implied usage is present, but no direct selection criteria are provided.

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