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

Annotations already declare readOnlyHint=true, so 'Read-only' is a redundant restatement rather than new information. The description does add behavioral scope by clarifying that only leagues with hub URLs on the site are returned, which tells the agent something about the result set that annotations do not.

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, scoping information front-loaded, no filler. Slightly terse but every clause carries meaning.

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-optional-param list tool with no output schema, the description covers what is returned (hub URLs on-site) and the read-only nature. Adequate, though it could say more about the result shape given the absence of an output schema.

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 100% and the single enum parameter (sport) is fully documented in the schema, including the soccer/football disambiguation. The description adds nothing beyond the schema, so the 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 (Lists) and resource (leagues), and narrows the scope to those with tip pages on bettingtipsai.com. The scope qualifier implicitly differentiates it from the tip/results siblings, though it never names 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?

Usage is implied by the scope ('leagues that have tip pages'), but there is no explicit when-to-use, when-not-to-use, or mention of the sibling tools as alternatives (get_match_tip, list_recent_results, list_today_tips).

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