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

Annotations already declare readOnlyHint=true, destructiveHint=false, openWorldHint=false, so the safety profile is fully covered. The description's only added behavioral signal is 'full data', which hints at completeness of the returned event but says nothing about missing-id errors or the odd idempotentHint=false.

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 verb front-loaded and zero wasted words. The scoping detail ('with its full data') follows the identifying clause naturally.

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 low-complexity single-parameter getter with a rich annotation set and no output schema, the description is nearly sufficient. It could only be improved by noting behavior on an unknown id or how the event is meant to be located.

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 event_id parameter is documented there, so the schema does the heavy lifting. The description's 'by id' merely restates the parameter without adding format, source, or lookup semantics.

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 and resource ('Read one audit event by id') plus scope ('with its full data'), which cleanly separates it from the list_audit_events sibling. It does not explicitly name the sibling, so it falls just short of a 5.

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?

There is no explicit when-to-use guidance or mention of alternatives; the 'by id' phrasing only implies it is for a known event id. It never tells the agent to prefer list_audit_events when the id is unknown, nor states any prerequisites.

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