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

No annotations are provided, so the description carries the full behavioral burden, and it discloses nothing: no indication of what happens when the given date is already a weekday, whether the input is a date string, whether a result is returned or the tool is idempotent, or what format the output takes.

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?

It is short, but the brevity is redundancy rather than economy — the single line repeats the tool name twice without conveying any information. It is under-specified rather than 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 date-computation tool with no annotations and no output schema, the description omits everything an agent needs: semantics of the two inputs, the behavior around weekends/holidays, and the result format. It is completely inadequate.

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?

Schema description coverage is 100% (both 'date' and 'weekday' are documented in the schema), so the baseline of 3 applies. The description adds no clarification of how 'weekday' interacts with 'date' (e.g., which wins, or whether weekday is an offset target), but it does not degrade the schema's own documentation.

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 is a verbatim restatement of the tool name: "Next Weekday: Next Weekday". It supplies no verb+resource statement, no output meaning, and no differentiation from the many sibling date tools such as x402-next-business-day, x402-prev-weekday, or x402-weekend-or-weekday.

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?

There is no when-to-use guidance, no exclusions, and no mention of alternatives. With directly competing siblings (prev-weekday, next-business-day, is-weekend), the description gives an agent nothing to route with.

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