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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is clear without the description. The description adds that it reports a 'complete expected baseline' and is separate from Agent drafts, but it does not explain permissions, scope limits, or what 'complete' means in practice.

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 with no filler. Its brevity is efficient, though the phrase 'complete expected baseline' remains underspecified.

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?

With an output schema and complete parameter descriptions, the definition does not need to explain return values. However, it remains ambiguous about what LINE 'behavior' and 'expected baseline' actually cover, which matters in a crowded set of LINE read siblings.

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%, so agent_id and channel_id are already documented in the schema. The description adds no parameter-specific meaning, which is acceptable at the baseline for fully covered parameters.

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 verb 'Reports' and resource 'LINE group behavior and complete expected baseline' are present, but 'behavior' and 'baseline' are not defined concretely. The phrase 'separate from Agent drafts' distinguishes it somewhat from draft-related siblings, but it does not clearly differentiate it from line_behavior_edit, line_activity_read, line_health_read, or line_profile_read.

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 only says it is 'separate from Agent drafts'; it does not state when to use this tool versus line_behavior_edit or the other LINE read tools. There is no explicit usage context, prerequisite, or exclusion beyond the vague drafts distinction.

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