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

No annotations are provided, so the description must disclose behavioral traits. It only mentions 'Returns: {error}', which is vague and does not confirm that the tool is a read-only calculation with no side effects. There is no mention of permissions, data modification, or success return structure.

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?

Extremely concise with two sentences. Immediately front-loaded with 'Solve PV=nRT'. No redundant information; every sentence earns its place.

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?

Given the tool's simplicity (4 parameters, no required), the description covers the input constraint and constant. However, it lacks clarity on the return format beyond '{error}', and the output schema exists but is not leveraged in the description. This leaves the success case unaddressed.

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 coverage is 100%, but the description adds value by specifying the constraint that exactly three parameters must be provided and giving the gas constant R. This goes beyond what the schema descriptions provide.

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?

Clearly states solving PV=nRT and specifies the four parameters involved. The verb 'Solve' and resource 'ideal gas law' make purpose unambiguous, differentiating it from many sibling calculate_* tools.

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?

Explicitly instructs to provide any 3 of the 4 parameters and mentions the constant R=8.314. Also references list_bundles for related calculators. However, it does not explicitly compare with sibling tools or state when not to use it.

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