Generate pin ideas

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 covered elsewhere. The description adds only that the generated angle bundle includes headline/format/visual brief/keyword, but says nothing about determinism, whether ideas are brand-safe, or how many candidates are produced. Against a low annotation bar this is adequate but thin.

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?

A single front-loaded sentence with the verb and deliverable first, followed by the angle taxonomy and output fields. The twelve-item parenthetical is long but carries genuine informational value, so it is dense rather than wasteful.

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?

For an 8-parameter tool with 25% schema coverage and no output schema, the description leaves the required inputs and optional modifiers unexplained and gives only a terse sketch of the return shape. The angle list is helpful, but an agent still lacks the information needed to populate the inputs correctly.

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 only 25% across 8 parameters, with just count ('Default 8') and keywords ('most important first') documented. The description never explains the required product_name/product_type inputs or how season, audience, benefits, or digital shape the generated angles, so it fails to compensate for the coverage gap.

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 (Generate) and resource (pin ideas), and enumerates the twelve pin angles plus the four output fields (overlay headline, format, visual brief, target keyword). This makes the deliverable concrete and largely separates it from write_pin_copy, though the boundary with that sibling is never made explicit.

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?

No when-to-use guidance, no prerequisites, and no reference to alternatives such as write_pin_copy or suggest_boards. The agent must infer that this is an ideation step preceding copywriting, which is not stated.

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