create_radar_chart

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

With no annotations provided, the description carries the behavioral disclosure burden. It discloses that the tool generates a chart file, supports overlaying series, and returns an absolute path to a .excalidraw file. It does not mention overwrite behavior or what happens when output_path is omitted, but the core side effects are clearly stated.

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 front-loaded with the core purpose and organized with an Args section and Returns line. It is efficient and does not contain filler, though the opening two sentences are slightly repetitive ('Create' and 'Generates').

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?

For a moderately complex tool with no annotations and a sparse schema, the description covers the main purpose, parameters, and return value. However, it omits important invocation details such as whether values and series are mutually exclusive, whether series values must match the axes count, and what theme values are supported beyond the schema default.

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 description coverage is 0%, so the description must compensate for missing parameter meaning. It adds useful semantics: axes must have minimum 3, values are 0-1 and one per axis, series are for comparison, and output_path/title are optional. Theme is only described as 'Color theme', leaving allowed values vague, but overall the description adds substantial meaning beyond the bare schema.

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 uses a specific verb and resource: 'Create a radar/spider chart' and explains the visual structure with axes radiating from center. This clearly distinguishes it from sibling diagram and chart tools without needing to inspect their schemas.

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 makes it clear this is for radar/spider charts and mentions single or multiple series overlay, but it does not explicitly state when to prefer this tool over alternatives or when not to use it. Usage context is implied rather than directly articulated.

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