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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the read-only, live-content nature is covered by structured data. The description adds nothing further about ordering, freshness, or result volume, so it meets but does not exceed the lower bar set by annotations.

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 the action and scope, then the parameter prerequisite. Every clause earns its place with no redundancy.

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 single-parameter read tool with an output schema and read-only annotations, the essentials are covered: what it returns, the scope, and where to get the slug. Minor gaps (no pagination or result-count guidance) keep it just below fully complete.

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 description coverage is 0%, so the description carries the parameter burden and does so: it identifies the argument as a 'section slug' and tells the agent to source it from skysports_sections. That is meaningful semantics beyond the bare string type, though it gives no format examples or validation hints.

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 ('Fetch') and resource ('current article cards and headlines') scoped to 'one Sky Sports section', which is clearly distinct from skysports_article and skysports_sections. It does not explicitly name the near-sibling skysports_news to draw the boundary, so it falls short of 5.

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?

'Provide a section slug from skysports_sections' implies the two-step workflow (list sections, then fetch headlines) and is a usable prerequisite hint. However, it never states when to choose this over skysports_news or skysports_article, so guidance is only implied.

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