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

Annotations already cover the safety profile (readOnlyHint, destructiveHint=false, openWorldHint), so the bar is lower. The description still adds real value by disclosing partial-failure behavior ('Teams that cannot be read are reported under errors') and the backing endpoint GET /v3/signls/report, which the agent cannot derive from structured fields.

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 sentences, front-loaded with the returned metrics and ending with the endpoint, with essentially no filler. Slightly dense but every clause carries information.

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 no output schema, the description does the work of sketching the return shape (per-team, per-category counts plus an errors bucket), which is what an agent needs to interpret results. It is thin on the exact time periods and pagination/size limits, but otherwise complete for a read-only report tool.

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 coverage is 100%, so both parameters are already documented, including the hint to fetch team ids from signl4_list_teams. The description only restates the user-scoping option and adds no syntax or default detail 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?

The description names a concrete resource (alert volume and response statistics) and enumerates exactly what is measured: acknowledged, closed and unhandled counts, overall and per category. That scoping distinguishes it cleanly from sibling reporting tools such as signl4_get_duty_summary and signl4_get_alert_timeline.

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?

There is no when-to-use or when-not-to-use guidance and no mention of the sibling report tools an agent might confuse this with. The 'optionally for one user' clause describes a parameter, not a usage condition, so the agent must infer the trigger context.

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