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

There are no annotations, so the description carries the full burden of behavioral disclosure, but it only describes the high-level operation. It does not disclose defaults for the optional length, the default padding character, behavior when the text is already longer than the target length, or how alignment modes are specified.

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 concise and front-loaded, with the core action in the first sentence and minimal filler. The redundant 'Text Pad:' prefix adds slight noise, but overall it is efficiently written.

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 five parameters, no meaningful schema descriptions, no annotations, and no output schema, the description is insufficient to reliably construct a call. The agent cannot determine accepted values for side, the difference between pad and char, whether length maps to n, or what happens when length is omitted.

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?

Although schema coverage is technically 100%, every parameter description is a placeholder ('N to process', 'Pad to process'), so the schema provides no real meaning. The prose hints at text, optional length, and alignment modes but never maps these concepts to the actual parameters n, pad, char, side, and input, leaving the agent to guess.

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 states a specific operation—pad text to a specified length—and mentions alignment modes, which identifies the core resource and behavior. However, it does not explicitly differentiate it from closely related sibling tools like x402-zero-pad or x402-text-wrap, so it stops short of a 5.

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 guidance is provided on when to use this tool versus the many adjacent text-manipulation siblings such as text-wrap, zero-pad, text-indent, or indent-lines. The description only implies a generic use case without offering alternatives, exclusions, or context about when this tool is the right choice.

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