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

With no annotations provided, the description carries full responsibility for disclosing behavior, and it discloses nothing. It doesn't say whether the tool generates, analyzes, or transforms n-grams, nor what output or side effects it produces.

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 short but this is under-specification, not effective conciseness. Repeating the name twice creates a tautology with zero informational value.

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 2 parameters, no output schema, and an ambiguous relationship to a sibling x402-ngram, this description is completely inadequate. Missing critical context: the meaning of n, the input format, the expected result, and how this tool differs from related ngram tools.

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 schema provides descriptions for both parameters (100% coverage), yielding the baseline of 3. Those descriptions are generic ('N to process', 'Input to process') and the tool description adds no further context, but the schema at least names both parameters.

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 'Ngram Gen: Ngram Gen', which merely restates the tool name and provides no verb, resource, or behavior. It does not distinguish this tool from the sibling x402-ngram, making the purpose entirely unclear.

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?

No usage guidance is given. The description does not mention when to use this tool, what problem it solves, or how it compares to alternatives like x402-ngram or x402-bigrams. An agent has no basis for selecting it over siblings.

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