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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, and openWorldHint=false, so the safety profile is fully covered. The description does add one useful behavioral fact beyond the annotations: results are scoped to the linked Market Brew account. That is real added context, but nothing is said about pagination, result shape, or volume.

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 short sentences with no filler, and the trigger condition is front-loaded. It is efficient, though the brevity comes at the cost of substance rather than because everything needed is already present.

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?

There is no output schema, so the description carries the burden of explaining what is returned; it only notes account scoping, not the shape or fields of the gap records. Given the nested query object and the presence of a closely related sibling, the definition is minimally viable but leaves clear gaps.

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%, and the single nested 'query' object is documented in the schema with its filter fields (websiteId, serverHost, prompt, source, maxSimilarity, sortBy, sortDir, offset, pageSize). The description adds no parameter meaning at all, so the baseline of 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 sentence restates the tool name almost verbatim ('Use this when the user asks to list Launchpad prompt gaps') without explaining what a prompt gap actually is. It also fails to distinguish this tool from the sibling list_launchpad_keyword_gaps, so an agent cannot tell them apart from the description alone.

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 only guidance is 'use when the user asks to list Launchpad prompt gaps,' which is a restatement of the name rather than a usage condition. No alternatives, exclusions, or prerequisites are mentioned, even though a near-identical sibling (list_launchpad_keyword_gaps) exists and needs disambiguation.

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