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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is fully covered without description help. The description adds only the endpoint hint (GET /events/{id}) and the entity taxonomy, but says nothing about pagination, not-found behavior, or what the returned payload contains.

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?

Two short sentences, front-loaded with the core purpose and followed by scope details, with zero filler or redundancy. Every clause carries information the agent can 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?

For a single-parameter, read-only lookup with annotations covering safety, the description is nearly sufficient. The one gap is that no output schema exists, so the shape of the returned activity is never described anywhere; otherwise nothing needed to invoke it correctly is missing.

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% and the single parameter activity_id is fully documented in the schema, so the baseline is 3. The description's 'by id' restates rather than enriches the schema's meaning and adds no format or range guidance beyond it.

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+resource ('One activity ... by id') and enumerates the entity types covered (task, call, appointment or note), so an agent immediately understands the return is a single activity record keyed by id. It implicitly contrasts with teamgate_list_activities but never names any sibling to make the distinction explicit.

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 phrase 'by id' hints that the caller must already possess an activity id, which is the only usage signal present. There is no statement of when to prefer this over teamgate_list_activities or teamgate_list_record_activities, and no prerequisites or error conditions are given.

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