racingandsports_todays_racing

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

Annotations already declare read-only and idempotent behavior, so the bar for additional transparency is lower. The description adds 'Auth: none needed' and describes the return structure, which is useful. However, it does not disclose potential rate limits, data freshness/timezone semantics, or any other behavioral nuances that might affect invocation expectations.

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 concise and well-structured: a one-sentence purpose statement followed by a compact, precise type definition for the return value. It includes only necessary information (auth note, grouping logic, URL fields) without any filler or 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 tool with no parameters and no output schema, the description is remarkably complete. It states what data is returned, how it is organized, the meaning of each field, and authentication requirements. The only minor omission is the timezone for 'today', but that does not undermine the overall completeness.

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?

The tool has zero parameters, so the input schema fully covers parameter semantics. The description adds value by detailing the return structure, which helps the agent understand what to expect, but this is not strictly about parameter meaning. Baseline for zero-parameter tools is 4.

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 clearly states what the tool does: returns today's race meetings across all codes (thoroughbred, harness, greyhound), grouped by country, with form-guide/results URLs. It specifies the resource ('today's race meetings'), the scope (all codes, grouped by country), and the output structure, making it distinct from many sibling racing tools.

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?

The description provides no explicit guidance on when to use this tool versus alternative racing tools such as betr_todays_races or tab_racing_meetings. It does not mention any trade-offs, exclusions, or preferred use cases beyond its inherent purpose of retrieving today's meetings.

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