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

Annotations already declare readOnlyHint=true, openWorldHint=false, and destructiveHint=false, so the safety profile is covered. The description adds a useful return-shape hint ('with the search_events fields'), but says nothing about error behavior for invalid ids or whether the TE… dashboard id resolves to the same object.

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 front-loaded sentence with no filler; the id-format detail is placed immediately after the verb. The trailing clause 'with the search_events fields' is terse to the point of being slightly ambiguous, but it is not wasteful.

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?

An output schema exists, so return values need not be spelled out, and parameters are fully documented in the schema. The only remaining gap is the absence of any guidance on failure modes or on how this differs from search_events, which keeps it short of a 5.

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 description coverage is 100%, with all three parameters documented including the evt_…/TE… formats and the multi-server requirement for server_name. The description restates the id formats but adds no meaning beyond the schema, so the baseline 3 applies.

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 ('Returns one event by its id') and scopes it to a single item, which implicitly separates it from list_events, query_events, and search_events. It does not explicitly name those siblings, so differentiation still requires the agent to infer it from the word 'one'.

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?

Single-item retrieval by id implies the use case (you already have an event id), but there is no explicit when-to-use or when-not, and no named alternative such as search_events for id-less lookup. Usage is inferable rather than stated.

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