x402_set_pricing

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

No annotations are provided, so the description must carry the burden of behavioral disclosure. It does not mention whether pricing is overwritten, idempotency, permission requirements, or the response format. For a mutation tool like this, more transparency is needed.

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 short sentences, front-loaded with the core purpose and free of fluff. Every word contributes meaning.

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?

The schema covers all parameter descriptions, but there is no output schema or annotations. The tool supports four pricing strategies that likely require different parameter combinations (e.g., tiers for tiered, perKB/perToken for dynamic), and the description does not explain these conditional dependencies. It is adequate but not complete for a config tool with this complexity.

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 provides descriptions for all eight parameters, so the description does not need to add per-parameter detail. The description's mention of pricing types maps to the enum but adds little beyond schema. Baseline of 3 is appropriate.

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 clearly states the tool configures pricing for an existing endpoint, using a specific verb ('Configure') and resource ('existing endpoint'). It also enumerates supported pricing strategies (fixed, dynamic, tiered, resource-based), which distinguishes it from sibling x402 tools like endpoint creation or payment limits.

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 phrase 'existing endpoint' implies this tool is used after an endpoint has been created, but it does not explicitly state when to use this tool versus alternatives, nor does it mention exclusions. It provides implied usage context rather than direct guidance.

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