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

With no annotations, the description carries the behavioral burden itself. 'Get' implies a read-only operation, and 'upcoming' plus 'free-tier competition' communicates filtering behavior. However, it does not disclose edge-case behavior such as what happens for unsupported competitions, invalid dates, or whether the date is an exact day or a range starting point.

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 a single, front-loaded sentence with no filler. Every phrase adds information: the action, the resource, the competition constraint, and the time zone.

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?

The tool is relatively simple and an output schema exists, so return values do not need to be described. Still, the description leaves ambiguity about how the date and 'upcoming' interact, and it offers no alternative routing or usage context, making it adequate but not 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 coverage is only 50% because the competition parameter lacks a description. The description partially compensates by mentioning competition and UTC date, and by adding the 'free-tier' qualifier, but it does not explain competition value semantics or the exact meaning of the date in relation to 'upcoming' beyond what the schema already says.

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 uses a specific verb ('Get') and resource ('upcoming football matches') and adds useful constraints ('free-tier competition', 'UTC date'). It is clear enough to distinguish from siblings like predict_match or get_team_form, though it does not explicitly contrast itself with them.

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?

There is no guidance on when to use this tool versus alternatives such as predict_matches or find_strongest_predictions. The description implies a basic use case but provides no exclusions, comparisons, or context for selecting it.

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