prime_operations

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

The only behavioral trait disclosed is the cost of $0.001 USDC via x402. With no annotations, the description should disclose what the tool actually does, but it does not explain side effects, required permissions, or what happens with different inputs.

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 and to the point, but the first part is tautological and the cost is the only concrete detail. It is not front-loaded with actionable information, though it avoids unnecessary verbosity.

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 output schema and no annotations, the description is grossly incomplete. A user cannot determine how to invoke the tool, what arguments to pass, or what the result will be, making it essentially unusable.

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 a single generic 'params' property with description 'Tool parameters as JSON object', which conveys no specific parameter meaning. The description adds nothing about expected fields (e.g., a number to test for primality or factor), so the actual parameters remain opaque.

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 says 'prime operations — Other Utilities tool', which restates the name and gives only a generic category. It does not state a specific verb or resource, nor distinguish it from other math tools like evaluate_math or quadratic_solver.

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 alternatives. The description does not mention scenarios, prerequisites, or contrast with sibling utility tools.

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