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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so the safety profile is fully covered by structured fields. The description adds a return-shape hint ('as a document'), which matters because there is no output schema, but it is vague about the actual format and says nothing about behavior for an unknown or stale id.

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?

One short sentence with the scope front-loaded and no filler. The trailing 'as a document' is slightly awkward and could be integrated more cleanly, but nothing is wasted.

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 one-parameter, non-nested read with no output schema, the description covers the essential question of what comes back ('full record') and where the input comes from. The missing pieces — the concrete document format and the not-found behavior — are minor given the annotations carry the safety profile.

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 100% and the single parameter is documented as 'The event id', so the baseline is a 3. The description goes beyond that by specifying provenance — the id must come from a prior search or search_events result — which the schema does not say and which prevents the agent from passing an arbitrary string.

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 concrete verb and resource: retrieves the full record of one event by id, and ties the id back to what search/search_events return. It stops short of distinguishing itself from the sibling get_event, which appears to overlap, so an agent cannot fully rule out the wrong pick from the description 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?

The description implies the intended workflow (call after search or search_events to expand a result into a full record), which is real usage context. It gives no explicit when-not-to-use condition and never addresses the overlapping get_event sibling, leaving the choice to inference.

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