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

No annotations are provided, so the description carries the full behavioral disclosure burden. It reveals nothing about how the tool behaves, what input it expects (especially given the empty schema), how it handles edge cases, or whether it mutates state. The description is a bare restatement of the name.

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 words, but this is under-pecification rather than conciseness. The second phrase 'Strip numbers.' adds no information beyond the title. It does not earn its place.

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?

With no annotations and no output schema, the description is the sole source of guidance. It fails to explain the tool's input source, behavior, or return value. An agent cannot determine how to invoke this tool or what it will do even after reading the complete definition.

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 input schema has zero parameters, so there is nothing to document. Per the rubric, 0 parameters warrants a baseline of 4. The description adds no parameter-level information, but none is required since no parameters exist.

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 'Strip Numbers: Strip numbers.' is a pure tautology that merely restates the tool name. It does not specify what 'strip' means (remove digits? remove whitespace? strip numeric formatting?), what input it operates on, or what output it produces. It fails to distinguish itself from siblings like x402-extract-numbers or x402-sort-numbers.

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 offers zero guidance on when to use this tool versus any alternative. There is no mention of use cases, exclusions, or aternative tools such as x402-extract-numbers for extracting numbers.

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