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

With no annotations, the description carries the full burden of behavioral disclosure. It explains that the tool returns the full specification and interface for each target, and deliberately withholds reference implementation and test vectors, which is a notable behavioral trait. It also asserts that unclear targets are bugs, indicating a quality guarantee. This goes beyond mere description and provides useful context for the agent.

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 moderately sized, front-loaded with the directive 'START HERE', and each sentence carries purpose. It explains the content, usage, and a design philosophy without redundancy. While it includes some philosophical commentary, it remains focused and efficient.

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 a single optional parameter, no output schema, and no annotations, the description is quite comprehensive. It explains what the tool returns, how to use it, what is intentionally omitted, and sets expectations for clarity. It doesn't specify the return format or pagination, but for a list/detail tool this is acceptable and likely handled by the interface. The description is sufficient for an agent to use it correctly.

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 coverage for the single parameter id is 100%, with a description that already explains it ('one target instead of the ladder'). The tool description adds 'Pass id to read one', reinforcing the usage but not adding substantially new meaning. Since the schema already documents the parameter, this meets the baseline of 3.

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 clearly states the tool's function: it provides a ladder of design targets with full specifications, interfaces, difficulty, and who cleared them. It distinguishes itself from sibling tools by being the entry point for design requirements. Though it doesn't use an explicit verb like 'list' or 'retrieve', the intent is unambiguous and it names the resource (targets).

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 opens with 'START HERE', implying this is the first tool to use, and mentions passing an id to read a single target. However, it doesn't explicitly contrast with alternatives or state when not to use it. It offers some contextual guidance but lacks explicit exclusions or comparisons to sibling tools.

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