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 nothing beyond them: it does not say how fresh the 'live' data is, how often it updates, whether it covers all formats, or what the feed contains. With an output schema present, the return format is covered, but the description contributes no behavioral context of its own.

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?

A single four-word phrase with zero filler, so it is certainly concise and front-loaded. However, the brevity is under-specification rather than disciplined economy, leaving nothing for the agent to act on.

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?

Signature is trivial (0 params) and an output schema exists, but the description still fails to convey the essential scope of a live feed: which matches appear (all live cricket? a default set?), and how it differs from cricinfo_scores. For a live-data tool this is too thin.

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 takes zero parameters, so there is no parameter semantics to explain; the baseline for a 0-param tool is 4. The description neither helps nor hurts here.

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 'Cricinfo live-score feed' essentially restates the tool name (cricinfo_live_matches) without a verb or scope. It does not distinguish itself from the sibling cricinfo_scores, cricinfo_match, or cricinfo_calendar, so an agent cannot tell which one to pick from this text alone.

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?

No when-to-use guidance, no exclusions, and no mention of any alternative tool. With several overlapping cricket score siblings (cricinfo_scores, cricinfo_match), the absence of routing guidance is a real gap.

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