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, and it discloses nothing. It does not say whether this is a pure computation, what the output looks like (single value vs. series), or how it handles periods longer than the input series.

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 wastes its entire length on a redundant restatement of the name, with no front-loaded purpose statement. Brevity here reflects under-specification rather than efficiency.

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 tool with two loosely-defined parameters, no annotations, and no output schema, the description should carry the explanatory load. It provides no formula, no return-value shape, and no invocation context, leaving an agent unable to call it confidently.

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%, so the baseline is 3 under the scoring rules. However, the schema's own text ('Period to process', 'Values to process') is vague, and the description adds no clarification that 'period' is the lookback window and 'values' is the price series.

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 'Williams R: Williams R' merely restates the tool name without a verb or resource explanation, so it is effectively a tautology. An agent must already know that Williams %R is a momentum oscillator to understand what this computes, and the description never states it.

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 indication of when to use this tool versus alternatives, no mention of inputs required, and no context about what analysis scenario it fits. Nothing routes the agent toward or away from this tool.

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