get_live_session

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

With no annotations, the description carries the load and largely does so: it discloses the empty/inactive state rather than erroring, and that Free-tier callers receive the latest milestone classification instead of live per-driver timing. It omits polling/freshness or rate-limit guidance, which matters for a live-state tool.

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?

Three sentences, front-loaded with what is returned, followed by the inactive-state and tier caveats. Every sentence adds operationally relevant information with no filler.

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?

No output schema exists, and the description names the returned fields and the empty-state shape, which covers most of the gap. It stops short of describing field structure or ordering within the live payload, leaving a small amount an agent must discover at runtime.

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?

There are zero parameters, so the baseline applies; the description neither needs nor provides argument semantics. The only interesting input dimension, subscription tier, is explained as an environmental gate rather than a parameter.

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?

It names a specific verb and resource ('Get the current live F1 session state') and enumerates the payload (flag status, lap number, positions, intervals, tyres, race control). The 'current live' scope cleanly separates it from historical siblings like get_race_summary and replay tools like list_replay_sessions.

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?

It supplies a clear when-not condition ('Returns an empty/inactive context when no session is live') and states the tier prerequisites for full timing data. It never names an alternative tool to use when no session is live, which leaves the routing decision slightly open.

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