Elder Futhark List

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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the tool is clearly a safe, read-only operation. The description adds little beyond the example body, but it does not contradict the annotations. Given the annotations, the burden is lower, and the description is adequate but not enriched.

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 very concise—two sentences plus a group label and example. Every element earns its place, and the critical info (all runes) is front-loaded. It could be slightly expanded without becoming verbose.

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 that there is no output schema, the description should explain what the tool returns (e.g., format, structure). It only states 'All 24 runes,' without indicating whether the output is an array, object, or includes additional metadata. For a complete description, more detail on the response format is needed.

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 input schema has 100% description coverage with a single 'body' parameter, whose schema description defers to the tool description. However, the tool description only provides an empty example ({}) and does not clarify what fields the body should contain. The schema says 'see the example in the tool description,' but the example is insufficient for understanding complex 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 'All 24 runes,' clearly indicating that the tool returns the complete list of Elder Futhark runes. This distinguishes it from sibling tools like runes_single or runes_three, which return a subset. However, it lacks an explicit verb like 'list' or 'get,' slightly reducing clarity.

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 provides no guidance on when to use this tool versus alternatives. While the sibling list includes more specific rune tools, the description itself does not help an agent choose between them. No context is given about suitable use cases or prerequisites.

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