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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, so safety is covered. The description adds useful domain behavior: the enumerated status semantics and the fact that these keywords get a guaranteed share of the plan. It does not mention pagination despite limit/offset existing, which is a small 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?

Front-loaded with the resource identity and scope in the opening clause, followed by the status taxonomy. It is a single dense sentence with many parentheses, which is information-efficient though slightly run-on.

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?

No output schema exists, so the description correctly carries the burden of explaining returned item fields (status meanings, volume, difficulty). It gives a nearly complete picture of what comes back, with only pagination behavior unaddressed.

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%, but the description goes beyond the schema by defining what each status enum value means (published, scheduled, covered, available, researching) and explains the 'coveredBy' and volume/difficulty fields. That is genuine added meaning beyond the one-line schema descriptions.

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 resource: 'The customer's own keyword list (Settings > Keywords)' with the per-item status model. Clear what it returns, but it never distinguishes itself from siblings like get_keywords, list_archived_keywords, or get_keyword_recommendations, so the agent must infer which 'keyword list' this is.

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?

Usage is implied ('These keywords get a guaranteed share of the plan. Free.') but there is no explicit when-to-use or when-not-to-use guidance and no named alternative. An agent cannot tell from this text when to prefer get_keywords or list_archived_keywords over this tool.

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