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

Annotations already declare readOnly, idempotent, non-destructive and closed-world. The description contributes beyond them by naming the concrete return fields (title, date, summary, URL), which is the main missing piece for a read tool with no output schema.

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?

Front-loaded with the core purpose, then the category vocabulary in a single parenthetical, then the return shape. The category enumeration is long but each item is functional rather than filler.

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 2-optional-param read tool with rich annotations, the description covers purpose, valid inputs, and return fields, so an agent can call it without opening the schema. Only the routing question against sibling search_articles is unaddressed.

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 is 100%, so baseline would be 3. The description earns above baseline by enumerating the valid category values in both slug and Korean form, effectively converting an open maxLength-50 string into a known allowlist — information the schema does not supply.

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?

Names a specific verb+resource ('Latest published articles from Festival Times'), identifies the source and its beat, and lists the categories served. An agent knows exactly what it retrieves, though it never distinguishes itself from sibling search_articles (keyword-driven) or get_festival.

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 implied by 'latest' and by the fact that both parameters are optional (call with no arguments for the default feed). There is no explicit statement of when to prefer this over search_articles, and no exclusions or prerequisites given.

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