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, yet it discloses nothing about which characters count as 'control chars,' whether the output replaces or returns new text, or error handling. It only restates the operation implied by 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?

While short, the description is purely duplicative – one half repeats the other with zero informational content. Brevity here reflects under-specification rather than efficient communication.

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, no output schema, and two ambiguous parameters, the description should explain scope and the text/input distinction but does neither. It is inadequate for correct invocation given the surrounding ambiguity.

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 even though the description adds no parameter detail. Notably the two params ('text' and 'input') are near-synonyms with generic descriptions, and the tool description does nothing to disambiguate which one to use or whether both are alternatives.

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 tautology: 'Remove Control Chars: Remove Control Chars' simply repeats the tool name without adding a verb+resource explanation. An agent can infer the operation from the name alone, but the description itself contributes no clarifying content or sibling differentiation.

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 guidance on when to use this tool versus the many other text-cleaning siblings (x402-remove-non-ascii, x402-remove-whitespace, x402-strip-punctuation, x402-text-clean, etc.). No conditions, exclusions, or alternatives are mentioned.

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