get_timeline

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

The description does not contradict the annotations (readOnlyHint and idempotentHint are consistent with 'Return'). However, it adds no behavioral context beyond the annotation title 'Fused event timeline' — it merely paraphrases it. Since annotations already disclose the safe read-only nature, the lack of additional context is acceptable but provides no extra insight.

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, front-loaded sentence that gets straight to the point. Every word earns its place; there is no waste or redundancy. It perfectly balances brevity with clarity.

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 an existing output schema, the description is mostly complete. It defines the tool's core purpose and scope. However, it lacks a bit of context about what 'merged' means (e.g., merged from which sources) and does not provide any usage alternatives, but the simplicity of the tool and the presence of the output schema mitigate this gap.

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?

The schema has one parameter (report_id) with no description (0% coverage). The description says 'for a report,' which implicitly ties report_id to a report, but it does not explicitly explain the parameter's format or purpose beyond the name itself. This provides minimal compensation for the schema gap, but the parameter is self-explanatory.

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 tool's function: 'Return the merged event timeline for a report.' It uses a specific verb ('Return') and a distinct resource ('merged event timeline') that differentiates it from sibling tools like get_repro_steps or get_error_evidence. The scope ('for a report') is 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 description implies when to use the tool (when you need the merged event timeline for a report) but does not provide explicit exclusions or mention alternatives. No sibling tools are referenced, so the agent must infer usage from the purpose alone. This falls short of clear guidance but is not misleading.

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