pad_text

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

With no annotations, the description must disclose behavioral traits but does not. It mentions a charge but not what the tool does, whether it is read-only, what inputs it accepts, or what output to expect. The behavior of padding is entirely undefined.

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 under-specification is not conciseness. It contains a category label and cost information but lacks meaningful content. The single sentence does not earn its place because it adds no functional explanation.

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?

Even for a simple tool, the description provides almost no contextual information beyond a cryptic name and cost. There is no mention of input requirements, output format, or behavior, making it impossible for an agent to invoke this tool correctly.

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 only declares a generic 'params' object with no property definitions. The description adds nothing about padding direction, character, amount, or any other parameter semantics. It fails to compensate for the schema's lack of detail.

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 merely restates the tool name ('pad text') and assigns a vague category ('Text & Encoding tool') without specifying what padding does. It does not state the verb+resource clearly, and there is no distinction from sibling text tools like wrap_text or truncate_text.

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 on when to use this tool versus alternatives. The only additional information is a cost note ('$0.001 USDC via x402'), which does not help select this tool over siblings. No context for preferred usage scenarios is provided.

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