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tschoonj

xraylib MCP Server

by tschoonj

AtomicLevelWidth

Retrieve the natural width of an atomic level by providing its atomic number and shell name.

Instructions

Get the natural width of an atomic level.

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?

With no annotations, the description must disclose behavioral traits. It does not mention side effects, permissions, rate limits, or what happens with invalid inputs. The tool appears safe but lacks transparency.

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

Conciseness4/5

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

The description is short and to the point, with two sentences and a list of arguments. It could be more efficient by combining the argument descriptions into prose, but overall it is not verbose.

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

Completeness3/5

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

Given there is an output schema (not shown), the description need not explain return values. However, it lacks context about what natural width represents, units, or common use cases. For a tool among many similar atomic data tools, more context would improve completeness.

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?

The description adds some meaning beyond the schema by specifying valid range for Z (1-120) and providing example shells. However, it does not explain the concept of natural width or how the shell parameter affects the result. Schema has 0% description coverage, so the description partially compensates.

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

Purpose5/5

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

The description clearly states 'Get the natural width of an atomic level' with a specific verb and resource. It distinguishes itself from siblings like LineEnergy or EdgeEnergy by focusing on width.

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 usage guidelines provided. The description does not specify when to use this tool over alternatives like LineEnergy or FluorYield, nor does it mention any prerequisites or exclusions.

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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