AtomicNumberToSymbol

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

With no annotations, the description carries full burden but only notes the input range (1-120). It does not disclose error handling (e.g., out-of-range values), return format, or whether the operation is pure/lookup. This is insufficient for a tool with no other behavioral hints.

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: one sentence and an Args line. Front-loaded with the core purpose. Every word is useful, no fluff.

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 (one param, clear output), the description is nearly complete. It states the input range and the conversion purpose. The existence of an output schema (not shown) removes the need to explain return format. Minor gap: no mention of error behavior for out-of-range inputs.

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 schema has 0% coverage, so the description's 'Atomic number (1-120)' adds crucial meaning beyond the schema. It clarifies the valid range, which is essential for correct usage. However, it could be more explicit about inclusive bounds and what happens for invalid inputs.

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 it converts an atomic number to element symbol, which is clear and specific. However, it does not explicitly distinguish it from the sibling tool SymbolToAtomicNumber, though the inverse relationship is obvious from the name.

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 description implies usage when you have an atomic number and need the symbol, but it gives no explicit when-to-use or when-not-to-use guidance compared to alternatives like SymbolToAtomicNumber.

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