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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds field-level context and notes the body is returned as plain text, but says nothing about whether the payload is truncated, how long articles are handled, or failure behavior for invalid ids.

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 sentences, front-loaded with the return contract and followed by the prerequisite for obtaining the id. No filler or redundancy beyond the minor overlap with the parameter description.

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 one-parameter read tool with 100% schema coverage, an output schema, and read-only annotations, this covers what the agent needs. The only shortfall is not naming fussballde_news_search as an alternate id source, which is a minor gap rather than a blocker.

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% and the single parameter is already documented with a concrete example ('Numeric article id from fussballde_news, e.g. 10067512'). The description's 'Use fussballde_news to find article ids' largely restates that, so baseline 3 applies.

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 ('Returns one FUSSBALL.DE news article') and enumerates exactly what comes back: title, category, publication date/time, lead image and caption, and body paragraphs as plain text. This lets an agent distinguish it from the sibling list/search tools without opening a schema.

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?

Explicitly routes the agent to 'fussballde_news' to obtain article ids, which is a real when-to-use/when-not signal. It does not mention the other plausible finder sibling, fussballde_news_search, so the routing guidance is clear but not exhaustive.

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