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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds real behavioral value by describing the shape of each returned record (id, search text, active flag, last-searched time, result count), which annotations cannot convey. It doesn't say whether the list is paginated or bounded, a minor remaining gap.

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?

Three short sentences, zero filler: what it lists, what each record contains, and how to use the ids. The core purpose is front-loaded in the first clause, so skimming yields the essential 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 correctly shoulders the burden of explaining return values, which it does field by field. The only omission is any note on result volume or pagination, which for a keyword tracker list is likely minor but not stated.

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 tool takes zero parameters, so the baseline is 4; there is nothing for the description to compensate for. Coverage is moot here and the schema is closed with additionalProperties=false.

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 ('The keywords whose results are tracked') and immediately enumerates the returned fields, so the agent knows exactly what this list contains. It is clearly distinguishable from siblings like search_results or list_sources, which return different entities.

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 final sentence gives an explicit downstream handoff: take an id from here and pass it as `keyword_id` to search_results, which makes the use case concrete. It does not state when NOT to use it or name a competing tool for listing keywords, so it stops short of a full 5.

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