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

The annotations already declare readOnlyHint=true and idempotentHint=true, so the description does not need to repeat that. It adds a meaningful behavioral constraint: only schedules owned by the caller can be read, which is not covered by the annotations. This extra context helps the agent understand access boundaries, though it does not mention error behavior for non-owned or missing events.

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?

The description is a single, concise sentence that immediately states the action and scope. There is no wasted wording, and the key constraint ('owned by the caller') is front-loaded. It is appropriately sized for the tool's simplicity.

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 simple read-only tool with one parameter and no output schema, the description covers the basic purpose and ownership. However, it does not explain the 'id' parameter or any expected response format, and the 'schedule' vs 'events' terminology inconsistency could cause confusion. It is minimally adequate but has gaps.

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 0% and the description does not explain what the 'id' parameter refers to. It does not explicitly say that 'id' is the identifier of the schedule/event. Given the low coverage, the description should have compensated by clarifying the parameter's meaning and format, but it does not.

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?

The description clearly states the verb 'Read' and the resource 'one schedule', and adds an ownership constraint ('owned by the caller') that distinguishes it from list or create operations. However, there is a slight inconsistency: the tool name and title say 'events' while the description says 'schedule', which could confuse an agent. Overall, the purpose is clear but not perfectly aligned.

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 usage for reading a single owned schedule, but it does not explicitly mention when to use alternatives like events_list for listing all events or events_create for creation. No exclusions are stated. An agent can infer the scope from 'one schedule' and 'owned by the caller', but the lack of explicit routing to siblings leaves some ambiguity.

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