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

No annotations are provided, so the description carries full behavioral burden. It discloses that the tool itself requires no API key and describes exactly what it explains. For a parameterless informational tool, there are no side effects or permission concerns left undisclosed.

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 two tight sentences with no filler. Each sentence adds distinct value: one states what the tool explains, the other states the authentication requirement. Important information is front-loaded.

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, empty parameter schema, and absence of an output schema, the description is complete. An agent can determine when to invoke it and what kind of content it will receive without additional context.

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 no parameter behavior to explain. The empty schema combined with 100% schema description coverage is not a gap; the baseline of 4 for a no-parameter tool applies.

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, 'Explain', and names the exact resources: the discovery/data boundary and how to attach a Sorqen API key. It also clarifies scope with 'No API key required', distinguishing it from sibling data-access tools like list_leagues and get_fair_value.

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 makes clear this tool is for authentication guidance, and the 'No API key required' note is a useful usage condition. It does not explicitly list when not to use it or name alternatives, but the sibling names show this is the only auth-related tool.

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