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tschoonj

xraylib MCP Server

by tschoonj

FluorYield

Calculate the fluorescence yield for a specified atomic shell by providing the atomic number and shell name.

Instructions

Get the fluorescence yield for a given shell.

Args: Z: Atomic number (1-120) shell: Shell name, e.g. "K_SHELL", "L1_SHELL"

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
ZYes
shellYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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

No annotations provided, so description carries full burden. It mentions Z range and shell name examples but does not disclose further behavior, such as return format or error handling.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Extremely concise: two sentences plus parameter list. No unnecessary words, every part adds value.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Even though an output schema exists, the description does not explain what the function returns (e.g., float yield value). It also lacks details on valid shell names beyond two examples.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 0%, but description adds meaning: Z explained with range (1-120) and shell with examples. This is helpful but not exhaustive, as no enum or full list is provided.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

Description clearly states it retrieves fluorescence yield for a given shell, with verb and resource. However, it does not distinguish from similar sibling tools like AugerYield or CS_FluorLine.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

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. Among many similar tools, the description provides no context for selection.

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

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