get_wallpaper_colors

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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safe-read nature is covered. The description adds that the colors are 'extracted' and tied to 'wallbash', which hints at derivation, but says nothing about what happens if no wallpaper is set or how stale the palette may be.

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?

A single front-loaded sentence with no filler. The parenthetical 'wallbash colors' is the only mildly jargon-y addition, but it earns its place by disambiguating the source of the palette.

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?

With no parameters, no output schema and read-only annotations, the definition is close to complete, but because there is no output schema the return shape (list of hex strings? named colors?) is left unclear, and 'wallbash' is unexplained for an agent unfamiliar with the environment.

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?

Zero parameters, so the baseline of 4 applies; there is no parameter semantics to document and the description doesn't need to carry any.

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?

States a specific verb (Get) and resource (extracted color palette from the current wallpaper), with the parenthetical 'wallbash colors' clarifying the derivation. It is distinguishable from siblings like get_wallpaper, list_theme_wallpapers and pick_color, though it doesn't explicitly mention them.

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?

Usage is only implied by the getter framing: call it when you need the wallpaper-derived palette. There is no statement of when to prefer it over pick_color or get_current_theme, nor any preconditions (e.g., whether a wallpaper must be set).

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