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

With no annotations, the description must carry the full load, and the word 'list' plus the enumerated fields establish a simple read that returns tier, category, and price. However, it says nothing about result size, pagination, or ordering, and does not state whether all skills are returned when no filter is passed.

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?

Two short sentences, front-loaded with what the tool returns and following with the optional filter. There is no redundant or filler phrasing.

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 simple, single-optional-parameter read tool with no output schema and no annotations, the definition covers purpose, returned fields, and the allowed filter values. The remaining gap, pagination or result-size behavior, is minor but real.

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 schema gives the single tier parameter at 0% description coverage, describing it only as a string. The description adds the key missing meaning by naming the accepted values (Basic, Standard, Advanced) and by marking the filter as optional, though it stops short of explaining filter-matching behavior.

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 and resource: it lists the skills for sale at The Log File store, and names the fields returned (tier, category, price). That distinguishes it from get_book, but it never contrasts itself with search_catalog or list_books, so the sibling separation is only partial.

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 says the tier filter is optional and enumerates its values, which implies when the parameter is worth using. It gives no guidance on when to use this list tool versus search_catalog or list_books, and no stated prerequisites or exclusions.

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